101
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Wang XL, Yuan CZ, Shen CP, Wang P, Adachi I, Aihara H, Arinstein K, Aushev T, Bakich AM, Barberio E, Bedny I, Bhardwaj V, Bitenc U, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chen A, Chen KF, Cheon BG, Chiang CC, Chistov R, Cho IS, Choi SK, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Go A, Gokhroo G, Ha H, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou WS, Hyun HJ, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki Y, Kah DH, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Lange JS, Lee JS, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liu Y, Liventsev D, Mandl F, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mori T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park CW, Park H, Park KS, Pestotnik R, Piilonen LE, Poluektov A, Sahoo H, Sakai Y, Schneider O, Sekiya A, Sevior ME, Shapkin M, Shibuya H, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Villa S, Vinokurova A, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Observation of two resonant structures in e+ e- -->pi+ pi- psi(2S) via initial-state radiation at Belle. Phys Rev Lett 2007; 99:142002. [PMID: 17930661 DOI: 10.1103/physrevlett.99.142002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Indexed: 05/25/2023]
Abstract
The cross section for e+ e- --> pi+ pi- psi(2S) between threshold and sqrt[s]=5.5 GeV is measured using 673 fb(-1) of data on and off the Upsilon(4S) resonance collected with the Belle detector at KEKB. Two resonant structures are observed in the pi+ pi- psi(2S) invariant-mass distribution, one at 4361 +/- 9 +/- 9 MeV/c2 with a width of 74 +/- 15 +/- 10 MeV/c2, and another at 4664 +/- 11 +/- 5 MeV/c2 with a width of 48 +/- 15 +/- 3 MeV/c2, if the mass spectrum is parametrized with the coherent sum of two Breit-Wigner functions. These values do not match those of any of the known charmonium states.
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Affiliation(s)
- X L Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, PR China
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102
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Zhang LM, Zhang ZP, Adachi I, Aihara H, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chiang CC, Cho IS, Choi Y, Choi YK, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gokhroo G, Golob B, Ha H, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi NJ, Kah DH, Kaji H, Kajiwara S, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee JS, Lee MJ, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liu Y, Liventsev D, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Sahoo H, Sakai Y, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shinomiya S, Shiu JG, Shwartz B, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsuboyama T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Villa S, Vinokurova A, Wang CH, Wang MZ, Wang P, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan CZ, Zhang CC, Zhilich V, Zupanc A. Measurement of D0-D0 mixing parameters in D0 --> Ks pi+ pi- decays. Phys Rev Lett 2007; 99:131803. [PMID: 17930576 DOI: 10.1103/physrevlett.99.131803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2007] [Indexed: 05/25/2023]
Abstract
We report a measurement of D0-D(0) mixing parameters in D(0) --> K(s)(0) pi(+) pi(-) decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb(-1) of data accumulated with the Belle detector at the KEKB e(+)e(-) collider. Assuming negligible CP violation, we measure the mixing parameters x = (0.80 +/- 0.29(-0.07-0.14)(+0.09+0.10))% and y = (0.33+/-0.24(-0.12-0.08)(+0.08+0.06))%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q / p| = 0.86(-0.29-0.03)(+0.30+0.06) +/- 0.08 and arg(q/p) = (-14(-18-3-4)(+16+5+2)) degrees .
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Affiliation(s)
- L M Zhang
- University of Science and Technology of China, Hefei
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103
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An HJ, Cho NH, Yang HS, Kwak KB, Kim NK, Oh DY, Lee SW, Kim HO, Koh JJ. Targeted RNA interference of phosphatidylinositol 3-kinase p110-beta induces apoptosis and proliferation arrest in endometrial carcinoma cells. J Pathol 2007; 212:161-9. [PMID: 17427168 DOI: 10.1002/path.2158] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Phosphatidylinositol 3-kinase (PI3K) signalling plays a pivotal role in intracellular signal transduction pathways involved in cell growth, cellular transformation, and tumourigenesis. PI3K is overexpressed in many human cancers, including endometrial carcinomas, one of the most common female genital tract malignancies. Here, we used small interfering RNA (siRNA) targeted to PI3K p110-beta to determine whether inhibition of the beta isoform could be a potential therapeutic target for endometrial carcinoma. In this study, treatment of HEC-1B endometrial cancer cells with PI3K p110-beta-specific siRNA resulted in increased apoptosis and decreased tumour cell proliferation. Depletion of PI3K p110-beta decreased the protein levels of AKT1, AKT2, pAKT, and mTOR-downstream targets of PI3K. Knock-down of PI3K p110-beta by siRNA also induced decreased expression of cyclin E and Bcl-2, suggesting that PI3K p110-beta stimulates tumour growth, at least in part by regulating cyclin E and Bcl-2. Thus, our results indicate that siRNA-mediated gene silencing of PI3K p110-beta may be a useful therapeutic strategy for endometrial cancers overexpressing PI3K p110-beta.
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Affiliation(s)
- H J An
- Department of Pathology, College of Medicine, Pochon CHA University, Sungnam, 463-712, Korea
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104
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Fratina S, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aushev T, Bakich AM, Barberio E, Bay A, Belous K, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Cole S, Dalseno J, Dash M, Drutskoy A, Eidelman S, Go A, Golob B, Gorisek A, Ha H, Haba J, Hara K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou WS, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee MJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liventsev D, Mandl F, Matsumoto T, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Mori T, Nakano E, Nakao M, Nakazawa H, Nishida S, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tian XC, Tikhomirov I, Trabelsi K, Tsukamoto T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Vervink K, Villa S, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zupanc A. Evidence for CP violation in B0-->D+D- decays. Phys Rev Lett 2007; 98:221802. [PMID: 17677834 DOI: 10.1103/physrevlett.98.221802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Indexed: 05/16/2023]
Abstract
We report measurements of the branching fraction and CP violation parameters in B(0)-->D+ D- decays. The results are based on a data sample that contains 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain [1.97+/-0.20(stat) +/- 0.20(syst)] x 10(-4) for the branching fraction of B0-->D+D-. The measured values of the CP violation parameters are S=-1.13+/-0.37+/-0.09, A=0.91+/-0.23+/-0.06, where the first error is statistical and the second is systematic. We find evidence of CP violation in B0-->D+D- at the 4.1sigma confidence level. While the value of S is consistent with expectations from other measurements, the value of the parameter A favors large direct CP violation at the 3.2sigma confidence level, in contradiction to standard model expectations.
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105
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106
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Ikado K, Abe K, Abe K, Adachi I, Aihara H, Akai K, Akemoto M, Anipko D, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Balagura V, Barbero M, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chen A, Chen WT, Choi Y, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Epifanov D, Flanagan J, Fratina S, Furukawa K, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara K, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Iida N, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kamitani T, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kikutani E, Kim HJ, Kim HO, Kinoshita K, Koiso H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee J, Lesiak T, Limosani A, Lin SW, Liventsev D, Marlow D, Matsumoto T, Matyja A, McOnie S, Michizono S, Mimashi T, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Nagamine T, Nakamura I, Nakamura TT, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ogawa Y, Ohmi K, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Park CW, Park H, Pestotnik R, Piilonen LE, Poluektov A, Rozanska M, Sakai Y, Schietinger T, Schneider O, Schwanda C, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shidara T, Shwartz B, Sidorov V, Sokolov A, Somov A, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Tawada M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yoshida M, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Evidence of the purely leptonic decay B- --> tau- nu(tau). Phys Rev Lett 2006; 97:251802. [PMID: 17280341 DOI: 10.1103/physrevlett.97.251802] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2006] [Revised: 10/18/2006] [Indexed: 05/13/2023]
Abstract
We present the first evidence of the decay B- --> tau- nu(tau), using 414 fb(-1) of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B- --> tau- nu(tau)) = (1.79(-0.49) +0.56(stat)(-0.51) +0.46(syst)) x 10(-4). This implies that fB = 0.229(-0.031) +0.036(stat)(-0.037) +0.034(syst) GeV and is the first direct measurement of this quantity.
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107
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Gabyshev N, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bakich AM, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gershon T, Gokhroo G, Golob B, Gorisek A, Hara T, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim SM, Kinoshita K, Korpar S, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, Mandl F, Matsumoto T, Mikami Y, Mitaroff W, Miyake H, Miyata H, Mizuk R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schwartz AJ, Senyo K, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CH, Wang MZ, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang H, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D. Study of decay mechanisms in B--->Lambdac+ppi- decays and observation of low-mass structure in the Lambdac+p system. Phys Rev Lett 2006; 97:242001. [PMID: 17280269 DOI: 10.1103/physrevlett.97.242001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Indexed: 05/13/2023]
Abstract
Using a sample of 152 x 10(6) BB pairs accumulated with the Belle detector at the KEKB e+e- collider, we study the decay mechanism of three-body charmed decay B- --> Lambdac+ ppi-. The intermediate two-body decay B--->Sigmac (2455)0 p is observed for the first time with a branching fraction of (3.7 +/- 0.7 +/- 0.4 +/- 1.0) x 10(-5) and a statistical significance of 8.4sigma. We also observe a low-mass enhancement in the (Lambdac+p) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35(-0.02)(+0.01) +/-0.02) GeV/c2 and a width of (0.07(-0.03)(+0.04) +/-0.04) GeV/c2. We measure its branching fraction to be (3.9(-0.7)(+0.8) +/- 0.4 +/- 1.0) x 10(-5) with a statistical significance of 6.2sigma. The errors are statistical, systematic, and that of the Lambdac+-->pK- pi+ decay branching fraction.
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Affiliation(s)
- N Gabyshev
- Budker Institute of Nuclear Physics, Novosibirsk
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108
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Chistov R, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee J, Lesiak T, Lin SW, Liventsev D, Mandl F, Marlow D, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nakano E, Nakao M, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schietinger T, Schneider O, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Suzuki S, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Won E, Wu CH, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang LM, Zhang ZP. Observation of new states decaying into Lambda(c)(+)Kappa(-)pi(+) and Lambda(c)(+)Kappa(0)/(s)pi(-). Phys Rev Lett 2006; 97:162001. [PMID: 17155385 DOI: 10.1103/physrevlett.97.162001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2006] [Indexed: 05/12/2023]
Abstract
We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader of the two states is measured to have a mass of 2978.5+/-2.1+/-2.0 MeV/c2 and a width of 43.5+/-7.5+/-7.0 MeV/c2. The mass and width of the narrow state are measured to be 3076.7+/-0.9+/-0.5 MeV/c;{2} and 6.2+/-1.2+/-0.8 MeV/c2, respectively. We also perform a search for the isospin partner states that decay into Lambda(c)(+)Kappa(0)/(s)pi(-) and observe a significant signal at the mass of 3082.8+/-1.8+/-1.5 MeV/c2. The data used for this analysis were accumulated at or near the Upsilon(4S) resonance, using the Belle detector at the e+ e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb(-1).
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Affiliation(s)
- R Chistov
- Institute for Theoretical and Experimental Physics, Moscow, Russia
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109
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Gokhroo G, Majumder G, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Aushev T, Aziz T, Bakich AM, Balagura V, Banerjee S, Belous K, Bitenc U, Bizjak I, Blyth S, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Fratina S, Gershon T, Go A, Golob B, Gorisek A, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HO, Kim YJ, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, Liventsev D, Mandl F, Matsumoto T, McOnie S, Mitaroff W, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nagasaka Y, Nakao M, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Pestotnik R, Piilonen LE, Sakai Y, Sarangi TR, Schietinger T, Schneider O, Seidl R, Senyo K, Shapkin M, Shibuya H, Sidorov V, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sugiyama A, Sumiyoshi T, Takasaki F, Tanaka M, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Usov Y, Varner G, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Wu CH, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V. Observation of a near-threshold D(0)D[over](0)pi(0) enhancement in B-->D(0)D[over](0)pi(0)Kappa decay. Phys Rev Lett 2006; 97:162002. [PMID: 17155386 DOI: 10.1103/physrevlett.97.162002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2006] [Indexed: 05/12/2023]
Abstract
We report the first observation of a near-threshold enhancement in the D(0)D[over](0)pi(0) system from B-->D(0)D[over](0)pi(0)Kappa decays using a 414 fb(-1) data sample collected at the Upsilon(4S) resonance. The enhancement peaks at a mass M=3875.2+/-0.7(+0.3)/(-1.6) +/-0.8 MeV/c2 and the branching fraction for events in the peak is B(B-->D(0)D[over](0)pi(0)Kappa)=(1.22+/-0.31(+0.23)/(-0.30))x10(-4). The data were collected with the Belle detector at the KEKB energy-asymmetric e+ e- collider.
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Affiliation(s)
- G Gokhroo
- Tata Institute of Fundamental Research, Bombay, India
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110
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Wu CH, Wang MZ, Abe K, Adachi I, Aihara H, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Bay A, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Browder TE, Chao Y, Chen A, Chen WT, Cheon BG, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Gabyshev N, Gershon T, Go A, Gokhroo G, Gorisek A, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hou S, Hou WS, Hsiung YB, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim YJ, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee J, Lee YJ, Lesiak T, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Palka H, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schietinger T, Schneider O, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shibuya H, Sidorov V, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Zhang LM, Zhang ZP. Study of J/psi-->pp[over],LambdaLambda[over] and observation of eta(c)-->LambdaLambda[over] at Belle. Phys Rev Lett 2006; 97:162003. [PMID: 17155387 DOI: 10.1103/physrevlett.97.162003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2006] [Indexed: 05/12/2023]
Abstract
We study the baryonic charmonium decays of B mesons B+-->etacK+ and B+-->J/psiK+, where the etac and J/psi subsequently decay into a pp[over] or LambdaLambda[over] pair. We measure the J/psi-->pp[over] and LambdaLambda[over] anisotropy parameters alphaB=-0.60+/-0.13+/-0.14 (pp[over]), -0.44+/-0.51+/-0.31 (LambdaLambda[over ]) and compare to results from e;{+}e;{-}-->J/psi formation experiments. We also report the first observation of etac-->LambdaLambda[over]. The measured branching fraction is B(etac-->LambdaLambda[over ])=(0.87(+0.24)/(-0.21)(stat)(+0.09/-0.14) (syst)+/-0.27(PDG))x10-3. This study is based on a 357 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
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Affiliation(s)
- C-H Wu
- Department of Physics, National Taiwan University, Taipei, Taiwan
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111
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Widhalm L, Abe K, Abe K, Adachi I, Aihara H, Arinstein K, Asano Y, Aushev T, Bakich AM, Balagura V, Barberio E, Barbero M, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chen A, Chen WT, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kakuno H, Kang JH, Kapusta P, Kataoka SU, Kawai H, Kawasaki T, Khan HR, Kim HJ, Kim HO, Kinoshita K, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kwon YJ, Lange JS, Leder G, Lee J, Lesiak T, Li J, Limosani A, Lin SW, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyata H, Miyazaki Y, Mohapatra D, Nakamura I, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Pakhlov P, Park CW, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Sato N, Satoyama N, Sayeed K, Schietinger T, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Somov A, Stamen R, Stanic S, Staric M, Stoeck H, Suzuki SY, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang LM, Zhang ZP, Zürcher D. Measurement of D0-->pilnu(Klnu) form factors and absolute branching fractions. Phys Rev Lett 2006; 97:061804. [PMID: 17026160 DOI: 10.1103/physrevlett.97.061804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2006] [Revised: 07/12/2006] [Indexed: 05/12/2023]
Abstract
Using a 282 fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider, we study D0 decays to K-l+nu and pi-l+nu final states. The D0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q2=(pl+pnu)2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be B(D0-->Klnu)=(3.45+/-0.07stat+/-0.20syst)% and B(D0-->pilnu)=(0.255+/-0.019stat+/-0.016syst)% and the semileptonic form factors (within the modified pole model) f+K(0)=0.695+/-0.007stat+/-0.022syst and f+pi(0)=0.624+/-0.020stat+/-0.030syst.
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Affiliation(s)
- L Widhalm
- Institute of High Energy Physics, Vienna, Austria
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Abstract
BACKGROUND Although epidermal and dermal T cells play roles in the pathogenesis of fixed drug eruption (FDE), not much is known about keratinocyte death and its precise mechanism in FDE. OBJECTIVES Our aim is to elucidate the mechanism that underlies keratinocyte death in FDE, that is, the role of apoptosis and its signalling pathway. METHODS We first examined the involvement of apoptosis in the active FDE lesions by terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end-labelling (TUNEL) assay and immunohistochemical analysis of caspase-3. We then examined the expressions of Fas and Fas ligand (FasL) to deduce the possible upstream signalling pathway of apoptosis, if apoptosis were involved. We finally characterized the infiltrated T-cell subpopulations in the active FDE lesions. RESULTS In the active FDE lesions, TUNEL positivity was strongly observed in the basal keratinocytes, and also weakly observed in the upper dermal infiltrates as well as in a few keratinocytes in the granular layer. The distribution of TUNEL-positive cells was similar to that of the strong staining of active capase-3. Fas was found mainly in the keratinocytes and some infiltrated dermal cells, whereas FasL was identified predominantly in the intraepidermal and dermal infiltrated cells and in some basal keratinocytes. Overlapping expression of Fas and FasL was accompanied by apoptosis in the FDE lesions. Many of the infiltrated mononuclear cells were CD8+. Perforin was rarely observed in the FDE lesions. CONCLUSIONS These findings suggest that apoptosis of the keratinocyte is highly likely to be involved in the pathogenesis of FDE, and this cytotoxicity might be predominantly mediated by the FasL of the infiltrating CD8+ T cells, possibly also playing an inflammatory role.
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Affiliation(s)
- H J Choi
- Department of Dermatology, Kangnam St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul, Korea
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113
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Mohapatra D, Nakao M, Nishida S, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barbero M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Gorisek A, Ha HC, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kataoka SU, Katayama N, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee J, Lesiak T, Limosani A, Lin SW, Liventsev D, Majumder G, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Mori T, Nakano E, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Palka H, Park CW, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Ronga FJ, Rozanska M, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Sokolov A, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wicht J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Observation of b-->dgamma and determination of /Vtd/Vts/. Phys Rev Lett 2006; 96:221601. [PMID: 16803300 DOI: 10.1103/physrevlett.96.221601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2006] [Indexed: 05/10/2023]
Abstract
We report the observation of the flavor-changing neutral current process b-->dgamma using a sample of 386 x 106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B--->rho-gamma, B0rho0gamma, and B0omegagamma. Assuming that these three modes are related by isospin, we find B(B-->(rho,gamma)gamma)=[Formula: See Text] with a significance of 5.1sigma. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements /Vtd/Vts/ to be [Formula: See Text].
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Affiliation(s)
- D Mohapatra
- Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
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Kim HO, Yun JW. A comparative study on the production of exopolysaccharides between two entomopathogenic fungi Cordyceps militaris and Cordyceps sinensis in submerged mycelial cultures. J Appl Microbiol 2005; 99:728-38. [PMID: 16162223 DOI: 10.1111/j.1365-2672.2005.02682.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The present study comparatively investigates the optimal culture conditions for the production of exopolysaccharides (EPS) and cordycepin during submerged mycelial culture of two entomopathogenic fungi Cordyceps militaris and Cordyceps sinensis. METHODS AND RESULTS Fermentations were performed in flasks and in 5-l stirred-tank fermenters. In the case of C. militaris, the highest mycelial biomass (22.9 g l(-1)) and EPS production (5 g l(-1)) were achieved in a medium of 40 g l(-1) sucrose, 5 g l(-1) corn steep powder at 30 degrees C, and an initial pH 8.0. The optimum culture conditions for C. sinensis was shown to be (in g l(-1)) 20 sucrose, 25 corn steep powder, 0.78 CaCl2, 1.73 MgSO4.7H2O at 20 degrees C, and an initial pH 4.0, where the maximum mycelial biomass and EPS were 20.9 and 4.1 g l(-1) respectively. Cordycepin, another bioactive metabolite, was excreted at low levels during the early fermentation period (maximum 38.8 mg l(-1) in C. militaris; 18.2 mg l(-1) in C. sinensis). CONCLUSIONS The two fungi showed different nutritional and environmental requirements in their submerged cultures. Overall, the concentrations of mycelial biomass, EPS and cordycepin achieved in submerged culture of C. militaris were higher than those of C. sinensis. SIGNIFICANCE AND IMPACT OF THE STUDY C. militaris and C. sinensis are representative insect-born fungi which have been longstanding and widely used as traditional medicines in eastern Asia. Comparative studies between two fungi are currently not available and this is the first report on the optimum medium composition for submerged culture of C. sinensis.
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Affiliation(s)
- H O Kim
- Department of Biotechnology, Daegu University, Kyungbuk, Korea
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115
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Sumisawa K, Ushiroda Y, Hazumi M, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bakich AM, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Haba J, Hara K, Hara T, Hayashii H, Higuchi T, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang H, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D. Measurement of time-dependent CP-violating asymmetries in B0 --> K(s)0K(s)0K(s)0 decay. Phys Rev Lett 2005; 95:061801. [PMID: 16090938 DOI: 10.1103/physrevlett.95.061801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2005] [Indexed: 05/03/2023]
Abstract
We present a measurement of CP-violation parameters in the B0 --> K(s)0K(s)0K(s)0 decay based on a sample of 275 x 10(6) BB pairs collected at the upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in the decay B0 --> K(s)0K(s)0K(s)0, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters are obtained from the asymmetry in the distributions of the proper-time interval between the two B decays: S = +1.26 +/- 0.68(stat) +/- 0.20(syst) and [symbol: see text] = +0.54 +/- 0.34(stat) +/- 0.09(syst).
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Samiulla DS, Vaidyanathan VV, Arun PC, Balan G, Blaze M, Bondre S, Chandrasekhar G, Gadakh A, Kumar R, Kharvi G, Kim HO, Kumar S, Malikayil JA, Moger M, Mone MK, Nagarjuna P, Ogbu C, Pendhalkar D, Rao AVSR, Rao GV, Sarma VK, Shaik S, Sharma GVR, Singh S, Sreedhar C, Sonawane R, Timmanna U, Hardy LW. Rational selection of structurally diverse natural product scaffolds with favorable ADME properties for drug discovery. Mol Divers 2005; 9:131-9. [PMID: 15789560 DOI: 10.1007/s11030-005-1297-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Natural product analogs are significant sources for therapeutic agents. To capitalize efficiently on the effective features of naturally occurring substances, a natural product-based library production platform has been devised at Aurigene for drug lead discovery. This approach combines the attractive biological and physicochemical properties of natural product scaffolds, provided by eons of natural selection, with the chemical diversity available from parallel synthetic methods. Virtual property analysis, using computational methods described here, guides the selection of a set of natural product scaffolds that are both structurally diverse and likely to have favorable pharmacokinetic properties. The experimental characterization of several in vitro ADME properties of twenty of these scaffolds, and of a small set of designed congeners based upon one scaffold, is also described. These data confirm that most of the scaffolds and the designed library members have properties favorable to their utilization for creating libraries of lead-like molecules.
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Affiliation(s)
- D S Samiulla
- Aurigene Discovery Technologies, Ltd., Electronic City Phase 2, Hosur Road, Bangalore-562158, India
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Kim HO, Lim JM, Joo JH, Kim SW, Hwang HJ, Choi JW, Yun JW. Optimization of submerged culture condition for the production of mycelial biomass and exopolysaccharides by Agrocybe cylindracea. Bioresour Technol 2005; 96:1175-1182. [PMID: 15683909 DOI: 10.1016/j.biortech.2004.09.021] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2004] [Revised: 09/20/2004] [Accepted: 09/23/2004] [Indexed: 05/24/2023]
Abstract
The optimization of submerged culture conditions and nutritional requirements was studied for the production of exopolysaccharide (EPS) from Agrocybe cylindracea ASI-9002 using the statistically based experimental design in a shake flask culture. Both maximum mycelial biomass and EPS were observed at 25 degrees C. The optimal initial pH for the production of mycelial biomass and EPS were found to be pH 4.0 and pH 6.0, respectively. Subsequently, optimum concentration of each medium component was determined using the orthogonal matrix method. The optimal combination of the media constituents for mycelial growth was as follows: maltose 80 g/l, Martone A-1 6 g/l, MgSO4 x 7H2O 1.4 g/l, and CaCl2 1.1 g/l; for EPS production: maltose 60 g/l, Martone A-1 6 g/l, MgSO4 x 7H2O 0.9 g/l, and CaCl2 1.1 g/l. Under the optimal culture condition, the maximum EPS concentration achieved in a 5-l stirred-tank bioreactor indicated 3.0 g/l, which is about three times higher than that at the basal medium.
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Affiliation(s)
- H O Kim
- Department of Biotechnology , Daegu University, Kyungsan, Kyungbuk 712-714, Korea
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Chao Y, Chang P, Abe K, Abe K, Abe N, Adachi I, Aihara H, Akai K, Akatsu M, Akemoto M, Asano Y, Aso T, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Ban Y, Barbero M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Danilov M, Dash M, Dong LY, Dowd R, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Epifanov D, Everton CW, Fang F, Flanagan J, Fratina S, Fujii H, Funakoshi Y, Furukawa K, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Grosse Perdekamp M, Guler H, Guo R, Haba J, Hagner C, Handa F, Hara K, Hara T, Hastings NC, Hasuko K, Hayasaka K, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou S, Hou WS, Hsiung YB, Huang HC, Igaki T, Igarashi Y, Iijima T, Ikeda H, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh K, Itoh R, Iwamoto M, Iwasaki M, Iwasaki Y, Kagan R, Kakuno H, Kamitani T, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kent N, Khan HR, Kibayashi A, Kichimi H, Kikuchi M, Kikutani E, Kim HJ, Kim HO, Kim H, Kim JH, Kim SK, Kim TH, Kinoshita K, Kobayashi S, Koiso H, Koppenburg P, Korpar S, Krizan P, Krokovny P, Kubo T, Kulasiri R, Kumar S, Kuo CC, Kurashiro H, Kurihara E, Kusaka A, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SE, Lee SH, Lee YJ, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Masuzawa M, Matsuishi T, Matsumoto H, Matsumoto S, Matsumoto T, Matyja A, Michizono S, Mikami Y, Mimashi T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Mizuk R, Mohapatra D, Moloney GR, Moorhead GF, Mori T, Mueller J, Murakami A, Nagamine T, Nagasaka Y, Nakadaira T, Nakamura I, Nakamura TT, Nakano E, Nakao M, Nakayama H, Nakazawa H, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa A, Ogawa S, Ogawa Y, Ohmi K, Ohnishi Y, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Parslow N, Peak LS, Pernicka M, Perroud JP, Peters M, Piilonen LE, Poluektov A, Ronga FJ, Root N, Rozanska M, Sagawa H, Saigo M, Saitoh S, Sakai Y, Sakamoto H, Sakaue H, Sarangi TR, Satapathy M, Sato N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seki T, Semenov S, Senyo K, Settai Y, Seuster R, Sevior ME, Shibata T, Shibuya H, Shidara T, Shwartz B, Sidorov V, Siegle V, Singh JB, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sugahara R, Sugi A, Sugimura T, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Tajima O, Takasaki F, Tamai K, Tamura N, Tanabe K, Tanaka M, Tawada M, Taylor GN, Teramoto Y, Tian XC, Tokuda S, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uchida K, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe M, Watanabe Y, Widhalm L, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamamoto N, Yamamoto S, Yamanaka T, Yamashita Y, Yamauchi M, Yang H, Yeh P, Ying J, Yoshida K, Yoshida M, Yuan Y, Yusa Y, Yuta H, Zang SL, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zheng Y, Zhilich V, Ziegler T, Zontar D, Zürcher D. Evidence for direct CP violation in B0-->K+pi- decays. Phys Rev Lett 2004; 93:191802. [PMID: 15600826 DOI: 10.1103/physrevlett.93.191802] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2004] [Indexed: 05/24/2023]
Abstract
We report evidence for direct CP violation in the decay B0-->K+pi(-) with 253 fb(-1) of data collected with the Belle detector at the KEKB e(+)e(-) collider. Using 275x10(6) BB pairs we observe a B-->K+/-pi(-/+) signal with 2140+/-53 events. The measured CP violating asymmetry is A(CP)(K+pi(-))=-0.101+/-0.025(stat)+/-0.005(syst), corresponding to a significance of 3.9sigma including systematics. We also search for CP violation in the decays B+-->K+pi(0) and B+-->pi(+)pi(0). The measured CP violating asymmetries are A(CP)(K+pi(0))=0.04+/-0.05(stat)+/-0.02(syst) and A(CP)(pi(+)pi(0))=-0.02+/-0.10(stat)+/-0.01(syst), corresponding to the intervals -0.05<A(CP)(K+pi(0))<0.13 and -0.18<A(CP)(pi(+)pi(0))<0.14 at 90% confidence level.
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Affiliation(s)
- Y Chao
- Department of Physics, National Taiwan University, Taipei
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Affiliation(s)
- J Y Song
- Department of Dermatology, Kangnam St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Seocho-ku, Seoul 137-701, Korea
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Sarangi TR, Abe K, Abe K, Abe T, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Ban Y, Banerjee S, Bitenc U, Bizjak I, Blyth S, Bondar A, Bracko M, Browder TE, Chang MC, Chang P, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Danilov M, Dash M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Haba J, Hara K, Hastings NC, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki M, Kang JH, Kang JS, Kapusta P, Kataoka SU, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim TH, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Lesiak T, Li J, Lin SW, Liventsev D, MacNaughton J, Mandl F, Marlow D, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Moloney GR, Nagamine T, Nagasaka Y, Nakadaira T, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Park KS, Parslow N, Piilonen LE, Rozanska M, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Semenov S, Senyo K, Sevior ME, Shibuya H, Sidorov V, Singh JB, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Swain SK, Tajima O, Takasaki F, Tanaka M, Taylor GN, Tomura T, Trabelsi K, Tsuboyama T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell KE, Wang CH, Wang MZ, Watanabe M, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Ying J, Yusa Y, Zhang J, Zhang ZP, Zheng Y, Zhilich V, Ziegler T, Zontar D. Study of CP violating effects in time dependent B0(B0)-->D(*)-/+pi+/- decays. Phys Rev Lett 2004; 93:031802. [PMID: 15323813 DOI: 10.1103/physrevlett.93.031802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2004] [Indexed: 05/24/2023]
Abstract
We report measurements of time dependent decay rates for B0(B(0))-->D((*)-/+)pi(+/-) decays and extraction of CP violation parameters containing phi(3). Using fully reconstructed D((*))pi events from a 140 fb(-1) data sample collected at the Upsilon(4S) resonance, we obtain the CP violation parameters for D(*)pi and Dpi decays, 2R(D((*))pi)sin((2phi(1)+phi(3)+/-delta(D((*))pi)), where R(D((*))pi) is the ratio of the magnitudes of the doubly Cabibbo-suppressed and Cabibbo-favored amplitudes, and delta(D((*))pi) is the strong phase difference between them. Under the assumption of delta(D((*))pi) being close to either 0 degrees or 180 degrees, we obtain |2R(D(*)pi)sin((2phi(1)+phi(3))|=0.060+/-0.040(stat)+/-0.019(syst) and |2R(Dpi)sin((2phi(1)+phi(3))|=0.061+/-0.037(stat)+/-0.018(syst).
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Affiliation(s)
- T R Sarangi
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Jung UJ, Kim HJ, Lee JS, Lee MK, Kim HO, Park EJ, Kim HK, Jeong TS, Choi MS. Naringin supplementation lowers plasma lipids and enhances erythrocyte antioxidant enzyme activities in hypercholesterolemic subjects. Clin Nutr 2003; 22:561-8. [PMID: 14613759 DOI: 10.1016/s0261-5614(03)00059-1] [Citation(s) in RCA: 155] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND AIMS Preliminary studies have shown that naringin has a potent lipid-lowering effect and antioxidant capacity in high-cholesterol diet fed animals. Accordingly, the present study was conducted to investigate the effect of naringin on hypercholesterolemic subjects. METHODS A hypercholesterolemic group (n=30) and healthy control group (n=30) were established based on the plasma cholesterol levels in the subjects, then all subjects received naringin (400mg/capsule/day) with regular meals for a period of 8 weeks. RESULTS In the hypercholesterolemic subjects, naringin supplementation was found to lower the plasma total cholesterol by 14% and low-density lipoprotein cholesterol concentrations by 17%, while the plasma triglyceride and high-density lipoprotein cholesterol concentrations remained unaffected. The apolipoprotein B levels in the hypercholesterolemic subjects were significantly lowered after naringin treatment, yet no change was observed in the apolipoprotein A-1 levels. The erythrocyte superoxide dismutase and catalase activities in the hypercholesterolemic group were significantly increased, whereas the glutathione peroxidase activity and plasma TBARS levels were not different from the baseline measurements. Meanwhile, naringin supplementation had no affect on plasma lipids, apolipoproteins, and TBARS levels or antioxidant enzyme activities in the control group. CONCLUSIONS Therefore, these data suggest that naringin may play an important role in lowering plasma cholesterol and regulating the antioxidant capacity in hypercholesterolemic subjects.
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Affiliation(s)
- U J Jung
- Department of Food Science and Nutrition, Kyungpook National University, Daegu, South Korea
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Abstract
OBJECTIVES To determine the current prevalence of syphilis in the general population of South Korea and its trend over the past 20 years. METHODS 15,402 adults, who all were aged over 20 (6888 blood donors, 4951 physical examinees, and 3563 pregnant women) were examined from January 1999 to December 2000. All subjects were screened using a VDRL test, and positive results were confirmed by a FTA-ABS test. The prevalence was compared with the results of previous surveys in similar population groups performed by same authors. RESULTS The prevalence of syphilis in South Korea was found to be 0.2%. Although has been consistent decreasing trend since 1977 (p<0.0001), there is no statistical difference between 1995 and 2000 (p=0.6992). CONCLUSIONS The prevalence of syphilis has decreased significantly since 1977. However, it has not reduced much since 1995, and it seems that the prevalence has reached a plateau. Until now, not all syphilis patients were registered and followed up by the public health centres because there were so many syphilis patients. However, as this survey shows, the number of syphilis patients has reduced a great deal and it is believed that a more thorough management strategy including all newly diagnosed patients is necessary in order to further reduce the prevalence of syphilis in South Korea.
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Affiliation(s)
- Y-H Cho
- Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea
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Krokovny P, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Bay A, Bedny I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Danilov M, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Haba J, Hara T, Hasuko K, Hayashii H, Hazumi M, Higuchi I, Higuchi T, Hojo T, Hoshi Y, Hou WS, Huang HC, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawakami Y, Kawasaki T, Kichimi H, Kim DW, Kim HJ, Kim HO, Kim H, Kim JH, Kobayashi S, Koppenburg P, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Lin SW, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsuishi T, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nakazawa H, Nam JW, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Peters M, Piilonen LE, Rozanska M, Rybicki K, Sagawa H, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schümann J, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Unno Y, Uno S, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yusa Y, Zhang CC, Zhang ZP, Zhilich V, Zontar D. Observation of B0 -->D0K0 and B0 -->D0K*0 decays. Phys Rev Lett 2003; 90:141802. [PMID: 12731906 DOI: 10.1103/physrevlett.90.141802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2002] [Indexed: 05/24/2023]
Abstract
We report on a search for B(0)-->D(*0)K(*0) decays based on 85 x 10(6) BB events collected with the Belle detector at KEKB. The B(0)-->D0K(0) and B(0)-->D0K(*0) decays have been observed for the first time with the branching fractions B(B(0)-->D0K(0))=(5.0(+1.3)(-1.2)+/-0.6)x10(-5) and B(B(0)-->D0K(*0))=(4.8(+1.1)(-1.0)+/-0.5)x10(-5). No significant signal has been found for the B(0)-->D(*0)K*0) and B(0)-->D(*0)K(*0) decay modes, and upper limits at 90% C.L. are presented.
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Affiliation(s)
- P Krokovny
- Budker Institute of Nuclear Physics, Novosibirsk
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Abe K, Abe K, Abe N, Abe R, Abe T, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Behera PK, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Casey BCK, Chang MC, Chang P, Chao Y, Cheon BG, Chistov R, Choi Y, Choi YK, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fujii H, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Golob B, Gordon A, Guo R, Haba J, Hara T, Harada Y, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kang JS, Katayama N, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Limosani A, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsuishi T, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Peak LS, Perroud JP, Peters M, Piilonen LE, Rodriguez JL, Ronga FJ, Root N, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yeh P, Yuan Y, Yusa Y, Zhang J, Zhang ZP, Zheng Y, Zhilich V, Zontar D. Studies of the decay B+/- -->D(CP)K+/-. Phys Rev Lett 2003; 90:131803. [PMID: 12689276 DOI: 10.1103/physrevlett.90.131803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2002] [Indexed: 05/24/2023]
Abstract
We report studies of the Cabibbo-suppressed decay B+/--->D(CP)K+/-, where D(CP) denotes CP eigenstates of the D0-D0; system. The analysis is based on a 29.1 fb(-1) sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored B+/--->D(CP)pi(+/-), of B(B--->D1K-)/B(B--->D1pi(-))=0.125+/-0.036+/-0.010 and B(B--->D2K-)/B(B--->D2pi(-))=0.119+/-0.028+/-0.006; the index 1 (2) denotes the CP=+1 (-1) eigenstate. We also extract the partial rate asymmetries for B+/--->D(CP)K+/-, finding A(1)=0.29+/-0.26+/-0.05 and A(2)=-0.22+/-0.24+/-0.04.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Gabyshev N, Kichimi H, Abe K, Abe K, Abe R, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Bedny I, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang MC, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fukunaga C, Garmash A, Gershon T, Golob B, Haba J, Hagner C, Handa F, Hara T, Hasuko K, Hayashii H, Hazumi M, Higuchi I, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hou WS, Hsiung YB, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kang JS, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawai H, Kawasaki T, Kim DW, Kim HJ, Kim HO, Kim H, Kim JH, Kim SK, Kinoshita K, Kobayashi S, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Lin SW, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsuishi T, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Peak LS, Perroud JP, Piilonen LE, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sarangi TR, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schümann J, Schwartz AJ, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tsuboyama T, Tsukamoto T, Uehara S, Unno Y, Uno S, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamashita Y, Yamauchi M, Yanai H, Yuan Y, Yusa Y, Zhang CC, Zhang ZP, Zheng Y, Zhilich V, Zontar D. Observation of the decay B0-->lambda+cp. Phys Rev Lett 2003; 90:121802. [PMID: 12688867 DOI: 10.1103/physrevlett.90.121802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2002] [Indexed: 05/24/2023]
Abstract
We report the measurement of the charmed baryonic decay B(0)-->Lambda(+)(c)p with a branching fraction of (2.19(+0.56)(-0.49)+/-0.32+/-0.57)x10(-5) and a statistical significance of 5.8 sigma. The errors are statistical, systematic, and the error of the Lambda(+)(c)-->pK(-)pi(+) decay branching fraction. This is the first observation of a two-body baryonic B decay. The analysis is based on 78.2 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) collider.
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Affiliation(s)
- N Gabyshev
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Fang F, Hojo T, Abe K, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Bakich AM, Ban Y, Banas E, Bay A, Behera PK, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Danilov M, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Golob B, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Kobayashi S, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Liventsev D, Lu RS, MacNaughton J, Mandl F, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nakazawa H, Nam JW, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Park CW, Park H, Park KS, Perroud JP, Peters M, Piilonen LE, Ronga FJ, Root N, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sakamoto H, Satapathy M, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Soni N, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Takahashi T, Takasaki F, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zhang ZP, Zhilich V, Zontar D. Measurement of branching fractions for B-->eta(c)K(*) decays. Phys Rev Lett 2003; 90:071801. [PMID: 12633223 DOI: 10.1103/physrevlett.90.071801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2002] [Indexed: 05/24/2023]
Abstract
We report measurements of branching fractions for charged and neutral B-->eta(c)K decays where the eta(c) meson is reconstructed in the K(0)(S)K+/-pi(-/+), K+K-pi(0), K(*0)K-pi(+), and pp; decay channels. The neutral B0 channel is a CP eigenstate and can be used to measure the CP violation parameter sin(2phi(1). We also report the first observation of the B0-->eta(c)K(*0) mode. The results are based on an analysis of 29.1 fb(-1) of data collected by the Belle detector at KEKB.
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Affiliation(s)
- F Fang
- University of Hawaii, Honolulu, Hawaii, USA
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128
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Kaneko J, Abe K, Abe K, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bartel W, Bay A, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi Y, Choi YK, Danilov M, Dong LY, Eidelman S, Eiges V, Enari Y, Everton CW, Fang F, Fujii H, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Guo R, Haba J, Handa F, Hara T, Harada Y, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hinz L, Hojo T, Hoshi Y, Hou WS, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kang JS, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Kobayashi S, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Limosani A, Lu RS, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Perroud JP, Peters M, Piilonen LE, Root N, Rybicki K, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Shibuya H, Shwartz B, Sidorov V, Singh JB, Soni N, Stanic S, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Tajima H, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Trabelsi K, Trischuk W, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zhang ZP, Zheng Y, Zhilich V, Zontar D. Measurement of the electroweak penguin process B-->X(s)l+l-. Phys Rev Lett 2003; 90:021801. [PMID: 12570535 DOI: 10.1103/physrevlett.90.021801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2002] [Indexed: 05/24/2023]
Abstract
We report the first measurement of the branching fraction for the inclusive decay B-->X(s)l(+)l(-), where l is either an electron or a muon, and X(s) is a hadronic recoil system that contains an s quark. We analyzed a data sample of 65.4 x 10(6) B meson pairs collected with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We find B(B-->X(s)l(+)l(-))=[6.1 +/-1.4(stat) +1.4-1.1(syst)] x 10(-6) for dilepton masses greater than 0.2 GeV/c(2).
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Affiliation(s)
- J Kaneko
- Tokyo Institute of Technology, Tokyo
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129
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Krokovny P, Abe K, Abe K, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Bedny I, Behera PK, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Everton CW, Fang F, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Golob B, Gordon A, Guo R, Haba J, Hanagaki K, Handa F, Harada Y, Hayashii H, Hazumi M, Heenan EM, Higuchi T, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hou WS, Huang HC, Igaki T, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Jang HK, Kaneko J, Kang JH, Kang JS, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Kobayashi S, Korpar S, Krizan P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Limosani A, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsuishi T, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nakazawa H, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Park CW, Park H, Perroud JP, Peters M, Piilonen LE, Ronga FJ, Root N, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schwanda C, Semenov S, Senyo K, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zhang ZP, Zheng Y, Zhilich V, Zontar D. Observation of D+(s)K- and evidence for D+(s)pi- final states in neutral B decays. Phys Rev Lett 2002; 89:231804. [PMID: 12485001 DOI: 10.1103/physrevlett.89.231804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2002] [Indexed: 05/24/2023]
Abstract
We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel B(0)-->D(+)(s)K- is found in a sample of 85 x 10(6) BB; events, collected with the Belle detector at KEKB, with a branching fraction B(B(0)-->D(+)(s)K-)=(4.6(+1.2)(-1.1)+/-1.3) x 10(-5). We also obtain evidence for the B0-->D(+)(s)pi(-) decay with branching fraction B(B0-->D(+)(s)pi(-))=(2.4(+1.0)(-0.8)+/-0.7) x 10(-5). This value may be used to extract a model-dependent value of |V(ub)|.
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Affiliation(s)
- P Krokovny
- Budker Institute of Nuclear Physics, Novosibirsk
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Nishida S, Nakao M, Abe K, Abe K, Abe T, Ahn BS, Aihara H, Akatsu M, Asano Y, Aushev T, Bakich AM, Ban Y, Banas E, Bartel W, Bay A, Bedny I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fukunaga C, Gabyshev N, Gershon T, Gordon A, Gotow K, Guo R, Haba J, Hara T, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Iijima T, Inami K, Ishikawa A, Ishino H, Itoh R, Iwamoto M, Iwasaki H, Iwasaki Y, Jalocha P, Jang HK, Kang JH, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim TH, Kinoshita K, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsumoto S, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori S, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nam JW, Natkaniec Z, Neichi K, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yuan Y, Yusa Y, Zhang J, Zhang ZP, Zhilich V, Zontar D. Radiative B meson decays into kpigamma and kpipigamma final states. Phys Rev Lett 2002; 89:231801. [PMID: 12484998 DOI: 10.1103/physrevlett.89.231801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2002] [Revised: 09/06/2002] [Indexed: 05/24/2023]
Abstract
We report observations of radiative B meson decays into the K+pi(-)gamma and K+pi(-)pi(+)gamma final states. In the B0-->K+pi(-)gamma channel, we present evidence for decays via an intermediate tensor meson state with a branching fraction of B(B0-->K(*)(2)(1430)(0)gamma)=[1.3+/-0.5(stat)+/-0.1(syst)]x10(-5). We measure the branching fraction B(B+-->K+pi(-)pi(+)gamma)=[2.4+/-0.5(stat) +0.4-0.2(syst)]x10(-5), in which the B+-->K(*0)pi(+)gamma and B+-->K+rho(0)gamma channels dominate. The analysis is based on a data set of 29.4 fb(-1) recorded by the Belle experiment at the KEKB collider.
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Lu RS, Abe K, Abe K, Abe N, Abe R, Abe T, Adachi I, Aihara H, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bedny I, Behera PK, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Casey BCK, Chang MC, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Everton CW, Fukunaga C, Gabyshev N, Gershon T, Golob B, Gordon A, Guo R, Haba J, Hara T, Harada Y, Hayashii H, Hazumi M, Heenan EM, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kapusta P, Kataoka SU, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Leder G, Lee SH, Li J, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsuishi T, Matsumoto S, Matsumoto T, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park CW, Park H, Peak LS, Perroud JP, Peters M, Piilonen LE, Root N, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Soni N, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamashita Y, Yamauchi M, Yeh P, Yuan Y, Zhang J, Zhang ZP, Zheng Y, Zontar D. Observation of B+/- -->omegaK+/- decay. Phys Rev Lett 2002; 89:191801. [PMID: 12443111 DOI: 10.1103/physrevlett.89.191801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2002] [Indexed: 05/24/2023]
Abstract
We report the first observation of the charmless two-body mode B+/--->omegaK+/- decay, and a new measurement of the branching fraction for the B+/--->omegapi(+/-) decay. The measured branching fractions are B(B+/--->omegaK+/-)=(9.2(+2.6)(-2.3)+/-1.0)x10(-6) and B(B+/--->omegapi(+/-))=(4.2(+2.0)(-1.8)+/-0.5)x10(-6). We also measure the partial rate asymmetry of B+/--->omegaK+/- decays and obtain A(CP)=-0.21+/-0.28+/-0.03. The results are based on a data sample of 29.4 fb(-1) collected on the Upsilon(4S) resonance by the Belle detector at the KEKB e(+)e(-) collider.
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Affiliation(s)
- R-S Lu
- National Taiwan University, Taipei
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Abe K, Abe K, Abe R, Abe T, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Bedny I, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Gordon A, Guo R, Handa F, Hara T, Harada Y, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokune T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsumoto S, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Root N, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yuan Y, Zhang J, Zhang ZP, Zhilich V, Zontar D. Observation of B(0)-->D((*)0)pp. Phys Rev Lett 2002; 89:151802. [PMID: 12365981 DOI: 10.1103/physrevlett.89.151802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2002] [Indexed: 05/23/2023]
Abstract
The B meson decay modes B-->Dpp; and B-->D(*)pp; have been studied using 29.4 fb(-1) of data collected with the Belle detector at KEKB. The B;(0)-->D(0)pp; and B;(0)-->D(*0)pp; decays have been observed for the first time with branching fractions B(B;(0)-->D(0)pp;)=(1.18+/-0.15+/-0.16)x10(-4) and B(B;(0)-->D(*0)pp;)=(1.20(+0.33)(-0.29)+/-0.21)x10(-4). No signal has been found for the B+-->D(+)pp; and B+-->D(*+)pp; decay modes, and the corresponding upper limits at 90% C.L. are presented.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe R, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bartel W, Bay A, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Gordon A, Guo R, Handa F, Hara T, Harada Y, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwamoto M, Iwasaki H, Iwasaki Y, Jang HK, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsumoto S, Matsumoto T, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Root N, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Trischuk W, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yuan Y, Yusa Y, Zhang ZP, Zhilich V, Zontar D. Observation of double cć production in e+e- annihilation at squareroot[s] approximately 10.6 GeV. Phys Rev Lett 2002; 89:142001. [PMID: 12366036 DOI: 10.1103/physrevlett.89.142001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2002] [Indexed: 05/23/2023]
Abstract
We report the observation of prompt J/psi via double cc; production from the e+e- continuum. In this process one cc; pair fragments into a J/psi meson while the remaining pair either produces a charmonium state or fragments into open charm. Both cases have been experimentally observed. We find cross sections of sigma[e+e- -->J/psieta(c)(gamma)]xB(eta(c)-->>or=4 charged)=(0.033(+0.007)(-0.006)+/-0.009) pb and sigma(e+e- -->J/psiD(*+)X)=(0.53(+0.19)(-0.15)+/-0.14) pb and infer sigma(e+e- -->J/psicc;)/sigma(e+e- -->J/psiX)=0.59(+0.15)(-0.13)+/-0.12. These results are obtained from a 46.2 fb(-1) data sample collected near the Upsilon(4S) resonance, with the Belle detector at the KEKB collider.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe R, Abe T, Aihara H, Akatsu M, Asano Y, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Bedny I, Behera PK, Bondar A, Bozek A, Brodzicka J, Browder TE, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fujii H, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Golob B, Gordon A, Guo R, Handa F, Hara T, Hayashii H, Hazumi M, Heenan EM, Higuchi T, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Huang HC, Igaki T, Iijima T, Ishikawa A, Itoh R, Iwamoto M, Iwasaki H, Iwasaki Y, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Li J, Liventsev D, MacNaughton J, Majumder G, Matsumoto S, Matsumoto T, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Park CW, Park H, Peak LS, Perroud JP, Piilonen LE, Ronga FJ, Root N, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Sevior ME, Shibuya H, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang J, Zhang ZP, Zhilich V, Zontar D. Observation of the decay B(0)-->D(+/-)D(*-/+). Phys Rev Lett 2002; 89:122001. [PMID: 12225079 DOI: 10.1103/physrevlett.89.122001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2002] [Indexed: 05/23/2023]
Abstract
We report the first observation of the decay B(0)-->D(+/-)D(*-/+) with the Belle detector at the KEKB e(+)e(-) Collider operated at the Upsilon(4S) resonance. The sum of branching fractions B(B(0)-->D(+)D(*-))+B(B(0)-->D(-)D(*+)) is measured to be (1.17+/-0.26(+0.22)(-0.25))x10(-3) using the full reconstruction method where both charmed mesons from B0 decays are reconstructed. A consistent value [(1.48+/-0.38(+0.28)(-0.31))x10(-3)] is obtained using a partial reconstruction technique that uses only the slow pion from the D(*-)-->D(-0)pi(-) decay and a fully reconstructed D(+) to reconstruct the B(0).
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Affiliation(s)
- K Abe
- Tohoku Gakuin University, Tagajo
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Choi SK, Olsen SL, Abe K, Abe K, Abe R, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi Y, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fujii H, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Gordon A, Guo R, Handa F, Hara T, Harada Y, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwamoto M, Iwasaki H, Iwasaki Y, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim TH, Kinoshita K, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsumoto S, Matsumoto T, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Peak LS, Perroud JP, Peters M, Piilonen LE, Ronga FJ, Root N, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Ushiroda Y, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang ZP, Zhilich V, Zontar D. Observation of the eta(c)(2S) in Exclusive B-->KK(S)K-pi(+) Decays. Phys Rev Lett 2002; 89:102001. [PMID: 12225186 DOI: 10.1103/physrevlett.89.102001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2002] [Indexed: 05/23/2023]
Abstract
We report the observation of a narrow peak in the K(S)K-pi(+) invariant mass distribution in a sample of exclusive B-->KK(S)K-pi(+) decays collected with the Belle detector at the KEKB asymmetric e(+)e(-) collider. The measured mass of the peak is M=3654+/-6(stat)+/-8(syst) MeV/c(2), and we place a 90% confidence level upper limit on the width of Gamma<55 MeV/c(2). The properties agree with heavy-quark potential model expectations for the eta(c)(2S) meson, the n=2 singlet S charmonium state.
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Affiliation(s)
- S-K Choi
- Gyeongsang National University, Chinju
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Abe K, Abe K, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bedny I, Behari S, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Everton CW, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Golob B, Gordon A, Guo R, Haba J, Hamasaki H, Hanagaki K, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwamoto M, Iwasaki H, Iwasaki Y, Jackson DJ, Jalocha P, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Koishi S, Konishi H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Limosani A, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsuishi T, Matsumoto S, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori S, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Prebys E, Rodriguez JL, Ronga FJ, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Tajima H, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Trischuk W, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yashima J, Yeh P, Yokoyama M, Yoshida K, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zheng Y, Zhilich V, Zontar D. Study of CP-violating asymmetries in B0-->pi(+)pi(-) decays. Phys Rev Lett 2002; 89:071801. [PMID: 12190513 DOI: 10.1103/physrevlett.89.071801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2002] [Indexed: 05/23/2023]
Abstract
We present a measurement of CP-violating asymmetries in B0-->pi(+)pi(-) decays based on a 41.8 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We fully reconstruct one neutral B meson as a B0-->pi(+)pi(-) CP eigenstate and identify the flavor of the accompanying B meson from its decay products. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we obtain the CP-violating asymmetry parameters S(pipi)=-1.21(+0.38)(-0.27)(stat)+0.16-0.13(syst) and A(pipi)=+0.94(+0.25)(-0.31)(stat)+/-0.09(syst).
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe T, Adachi I, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Bracko M, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Everton CW, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Golob B, Gordon A, Gotow K, Guo R, Haba J, Hamasaki H, Hanagaki K, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jackson DJ, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Konishi H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Limosani A, Liventsev D, Lu RS, MacNaughton J, Mandl F, Marlow D, Matsumoto S, Matsumoto T, Mikami Y, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Moorhead GF, Mori S, Mori T, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Ronga F, Root N, Rozanska M, Rybicki K, Ryuko J, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Singh JB, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yokoyama M, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zheng Y, Zhilich V, Zontar D. Observation of chi(c2) production in B meson decay. Phys Rev Lett 2002; 89:011803. [PMID: 12097032 DOI: 10.1103/physrevlett.89.011803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2002] [Indexed: 05/23/2023]
Abstract
We report the first observation of chi(c2) production in B meson decays. We find an inclusive B-->chi(c2)X branching fraction of (1.80(+0.23)(-0.28)+/-0.26) x 10(-3). The data set, collected with the Belle detector at the KEKB e(+)e(-) collider, consists of 31.9 x 10(6) BB events. We also present branching fractions and momentum spectra for both chi(c1) and chi(c2) production.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe R, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Everton CW, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gotow K, Guo R, Haba J, Hamasaki H, Handa F, Hara K, Hara T, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Huang HC, Igaki T, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jalocha P, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Konishi H, Korpar S, Krizan P, Krokovny P, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Limosani A, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsuishi T, Matsumoto S, Mikami Y, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Nagamine T, Nagasaka Y, Nagashima Y, Nakao M, Nam JW, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Ronga F, Root N, Rybicki K, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Shibuya H, Schwartz B, Sidorov V, Singh JB, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Suzuki K, Suzuki SY, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yanaka S, Yeh P, Yokoyama M, Yuan Y, Zhang J, Zheng Y, Zontar D. Observation of B(+/-) --> p(-)pK(+/-). Phys Rev Lett 2002; 88:181803. [PMID: 12005679 DOI: 10.1103/physrevlett.88.181803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2002] [Indexed: 05/23/2023]
Abstract
We report the observation of the decay mode B(+/-) --> p(-)pK(+/-)based on an analysis of 29.4 fb(-1) of data collected by the Belle detector at KEKB. This is the first example of a b-->s transition with baryons in the final state. The p(-)p mass spectrum in this decay is inconsistent with phase space and is peaked at low mass. The branching fraction for this decay is measured to be B(B+/--->p(-)pK+/-) = [4.3(+1.1)(-0.9)(stat)+/-0.5(syst)]x 10(-6). We also report upper limits for the decays B(0)-->p(-)pK(S) and B(+/-)-->p(-)p pi(+/-).
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Affiliation(s)
- K Abe
- Aomori University, Aomori, Japan
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Abe K, Abe K, Abe R, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aushev T, Bakich AM, Ban Y, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Brodzicka J, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Everton CW, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gordon A, Guler H, Guo R, Haba J, Hamasaki H, Hanagaki K, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Konishi H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Limosani A, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsubara T, Matsuishi T, Matsumoto S, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori S, Mori T, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Rodriguez JL, Ronga F, Rozanska M, Rybicki K, Sagawa H, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Tajima H, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yanaka S, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zheng Y, Zhilich V, Zontar D. Precise measurement of B meson lifetimes with hadronic decay final states. Phys Rev Lett 2002; 88:171801. [PMID: 12005744 DOI: 10.1103/physrevlett.88.171801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2002] [Indexed: 05/23/2023]
Abstract
The lifetimes of the B(0) and B- mesons are extracted from 29.1 fb(-1) of data collected with the Belle detector at the KEK B factory. A fit to the decay length differences of neutral and charged B meson pairs, measured in events where one of the B mesons is fully reconstructed in several hadronic modes, yields tau(B(0)) = 1.554+/-0.030(stat)+/-0.019(syst) ps, tau(B-) = 1.695+/-0.026(stat)+/-0.015(syst) ps, and tau(B-)/tau(B(0)) = 1.091+/-0.023(stat)+/-0.014(syst).
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe R, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Behari S, Behera PK, Bondar A, Bozek A, Browder TE, Casey BCK, Chao Y, Cheon BG, Chistov R, Choi Y, Dong LY, Eidelman S, Eiges V, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gordon A, Guo R, Haba J, Hamasaki H, Hanagaki K, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jalocha P, Jang HK, Kang JH, Kang JS, Katayama N, Kawai H, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim TH, Kinoshita K, Kobayashi S, Konishi H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Liventsev D, MacNaughton J, Marlow D, Matsubara T, Matsumoto S, Matsumoto T, Mikami Y, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori S, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Perroud JP, Peters M, Piilonen LE, Rodriguez JL, Root N, Rozanska M, Rybicki K, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Singh JB, Stanic S, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Tajima H, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Tanaka Y, Teramoto Y, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yokoyama M, Yoshida K, Yusa Y, Zhang CC, Zhang J, Zheng Y, Zhilich V, Zontar D. Measurement of the lifetime difference in D0 meson decays. Phys Rev Lett 2002; 88:162001. [PMID: 11955228 DOI: 10.1103/physrevlett.88.162001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2001] [Indexed: 05/23/2023]
Abstract
We report a measurement of the D0-D macro(0) mixing parameter y(CP) using 23.4 fb(-1) of data collected near the Upsilon(4S) resonance with the Belle detector at KEKB. y(CP) is measured from the lifetime difference of D0 mesons decaying into the K(-)pi(+) state and the CP-even eigenstate K(-)K(+). We find y(CP) = (-0.5+/-1.0(+0.7)(-0.8))x10(-2), where the first error is statistical and the second is systematic, corresponding to a 95% confidence interval -0.030<y(CP)<0.020.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aushev T, Bakich AM, Ban Y, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Dong LY, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gordon A, Guo R, Haba J, Hamasaki H, Handa F, Hara K, Hara T, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Hokuue T, Hoshi Y, Hou SR, Hou WS, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jalocha P, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Kobayashi S, Konishi H, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Liventsev D, Lu RS, MacNaughton J, Marlow D, Matsubara T, Matsumoto S, Matsumoto T, Mikami Y, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori S, Mori T, Nagamine T, Nagasaka Y, Nagashima Y, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peters M, Piilonen LE, Root N, Rybicki K, Ryuko J, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki JI, Suzuki K, Suzuki S, Swain SK, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Tanaka Y, Taylor GN, Teramoto Y, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Trischuk W, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Vahsen SE, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamashita Y, Yamauchi M, Yoshida K, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zhao HW, Zheng Y, Zhilich V, Zontar D. Production of prompt charmonia in e(+)e(-) annihilation at square root of s approximately equals 0.6 GeV. Phys Rev Lett 2002; 88:052001. [PMID: 11863715 DOI: 10.1103/physrevlett.88.052001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2001] [Indexed: 05/23/2023]
Abstract
The production of prompt J/psi, psi(2S), chi(c1), and chi(c2) is studied using a 32.4 fb(-1) data sample collected with the Belle detector at Upsilon(4S) and at 60 MeV below the resonance. The yield of prompt J/psi mesons in the Upsilon(4S) sample is compatible with that of continuum production; we set an upper limit B(Upsilon(4S)-->J/psiX) < 1.9 x 10(-4) at the 95% confidence level, and find sigma(e(+)e(-)-->J/psiX) = 1.47 plus/minus 0.10 plus/minus 0.13 pb. The cross sections for prompt psi(2S) and direct J/psi are measured. The J/psi momentum spectrum, production angle distribution, and polarization are studied.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe R, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Browder TE, Casey BCK, Chang P, Chao Y, Chen KF, Cheon BG, Chistov R, Choi SK, Choi Y, Dong LY, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fang F, Fujii H, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gordon A, Gotow K, Guo R, Haba J, Hamasaki H, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hirano H, Hojo T, Hokuue T, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jackson DJ, Jang HK, Kakuno H, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Kobayashi S, Konishi H, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Liventsev D, Lu RS, Matsubara T, Matsumoto S, Matsumoto T, Mikami Y, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Moorhead GF, Mori S, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peak LS, Peters M, Piilonen LE, Rodriguez JL, Root N, Rozanska M, Rybicki K, Ryuko J, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov A, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Tanaka Y, Taylor GN, Teramoto Y, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yanaka S, Yashima J, Yokoyama M, Yoshida K, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zheng Y, Zhilich V, Zontar D. Observation of the color-suppressed decay B( 0)-->D(0)pi(0). Phys Rev Lett 2002; 88:052002. [PMID: 11863716 DOI: 10.1103/physrevlett.88.052002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2001] [Indexed: 05/23/2023]
Abstract
We report the first observation of color-suppressed B( 0)-->D(0)pi(0), D(*0)pi(0), D0eta, and D0omega decays, and evidence for B( 0)-->D(*0)eta and D(*0)omega. The branching fractions are B(B( 0)-->D0pi(0)) = (3.1 +/- 0.4 +/- 0.5)x10(-4), B(B( 0) -->D(*0)pi(0)) = (2.7(+0.8+0.5)(-0.7-0.6))x10(-4), B(B( 0) --> D0eta) = (1.4(+0.5)(-0.4) +/- 0.3)x10(-4), B(B( 0) --> D0omega) = (1.8 +/- 0.5(+0.4)(-0.3))x10(-4), and we set 90% confidence level upper limits of B(B( 0) --> D(*0)eta)<4.6 x 10(-4) and B(B( 0)-->D(*0)omega)<7.9 x 10(-4). The analysis is based on a data sample of 21.3 fb(-1) collected at the Upsilon(4S) resonance by the Belle detector at the KEKB e(+)e(-) collider.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe R, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi Y, Dong LY, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gordon A, Gotow K, Guo R, Haba J, Hamasaki H, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Hirano H, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jackson DJ, Jang HK, Kagan R, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Kobayashi S, Konishi H, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Liventsev D, Lu RS, Marlow D, Matsubara T, Matsumoto S, Matsumoto T, Mikami Y, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Moorhead GF, Mori S, Mori T, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peak LS, Peters M, Piilonen LE, Rodriguez JL, Root N, Rozanska M, Rybicki K, Ryuko J, Sagawa H, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Tanaka Y, Taylor GN, Teramoto Y, Tomoto M, Tomura T, Tovey SN, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Vahsen SE, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yanaka S, Yashima J, Yokoyama M, Yoshida K, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zhao HW, Zheng Y, Zhilich V, Zontar D. Observation of B+ --> chi(c0)K+. Phys Rev Lett 2002; 88:031802. [PMID: 11801054 DOI: 10.1103/physrevlett.88.031802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2001] [Indexed: 05/23/2023]
Abstract
Using a sample of 31.3x10(6) BB pairs collected with the Belle detector at the Upsilon(4S) resonance, we make the first observation of the charged B meson decay to chi(c0) and a charged kaon. The measured branching fraction is B(B+-->chi(c0)K+) = (6.0(+2.1)(-1.8)+/-1.1)x10(-4), where the first error is statistical, and the second is systematic.
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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Abe K, Abe K, Abe R, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Browder TE, Casey BCK, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Dong LY, Drutskoy A, Eidelman S, Enari Y, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gordon A, Gotow K, Guo R, Haba J, Hamasaki H, Hanagaki K, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hirano H, Hojo T, Hokuue T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jackson DJ, Jang HK, Kakuno H, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kinoshita K, Kobayashi S, Konishi H, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Liventsev D, Lu RS, MacNaughton J, Matsubara T, Matsumoto S, Matsumoto T, Mikami Y, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Moorhead GF, Mori S, Mori T, Murakami A, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peak LS, Peters M, Piilonen LE, Rodriguez JL, Root N, Rozanska M, Rybicki K, Ryuko J, Sagawa H, Sakai Y, Sakamoto H, Satpathy A, Schrenk S, Semenov S, Senyo K, Sevior ME, Shibuya H, Schwartz B, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Swain SK, Tajima H, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Tanaka Y, Taylor GN, Teramoto Y, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yashima J, Yokoyama M, Yoshida K, Yusa Y, Yuta H, Zhang CC, Zhang J, Zhao HW, Zheng Y, Zhilich V, Zontar D. Observation of the decay B --> Kl+l-. Phys Rev Lett 2002; 88:021801. [PMID: 11801003 DOI: 10.1103/physrevlett.88.021801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2001] [Revised: 10/19/2001] [Indexed: 05/23/2023]
Abstract
We report a search for the flavor-changing neutral current decay B-->K(*)l+l- using a 29.1 fb(-1) data sample accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We observe the decay process B-->Kl+l-(l = e, mu), for the first time, with a branching fraction of B(B-->Kl+l-) = (0.75(+0.25)(-0.21)+/-0.09)x10(-6).
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Affiliation(s)
- K Abe
- High Energy Accelerator Research Organization (KEK), Tsukuba
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145
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Abstract
2-(1-Hexynyl), 2-((E)-1-hexenyl) and 2-(n-hexyl)-N6-methyladenines were synthesized, starting from 2-amino-6-chloropurine using palladium-catalyzed coupling as a key step as potential adenosine receptor ligand.
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Affiliation(s)
- H O Kim
- Division of Chemistry and Molecular Engineering, Seoul National University, Korea.
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146
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Abstract
Neural stem cells have been proposed as useful vectors for treating diseases in the CNS, but their utility is severely limited by lack of accessibility. Brain development is ongoing extensively in early postnatal life. However, it is unclear whether stem cells that differentiate into neurons exist in the blood during early postnatal life. We showed in this experiment that neural markers (NeuN, neurofilament, MAP2, GFAP) are expressed and long cytoplasmic processes are elaborated in the cultured human cord blood monocytes prepared from newborn umbilical blood. These results suggest that stem cells in human cord blood may be potential sources of neurons in early postnatal life. We suggest that the neonatal blood system functions as a circulating pool of different types of stem cell.
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Affiliation(s)
- Y Ha
- Department of Neurosurgery, Seoul District Hospital, 165 Sokyuk-dong, Jongro-gu, Seoul 110-200, Korea
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147
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Abstract
Gold sodium thiosulfate (GSTS) is reputed to be the most reliable gold antigen, but control studies are still required. Although Koreans have more varied sources of contact with gold, such as herbal medicines with gold coatings and indwelling gold acupuncture needles, no epidemiological studies have been performed. This study examined the frequency and sources of contact allergy to gold in South Korea by a multicenter study. Patch testing with 0.5% GSTS in pet. was conducted in 255 eczema patients and 58 control subjects. Results were observed at 21 days (D) to ensure there were no undetected late reactions in 54 observed patients and 47 controls. 8 (3.1%) of the 255 patients reacted positively to GSTS, including 1 with a late reaction. 1 of the 58 controls showed a positive reaction to GSTS on D4 with a negative reaction on D14. Clinical relevance was lacking in the patients with positive reactions. Unexpectedly, the above particular sources of gold contact gave rise to few allergic reactions in our patients.
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Affiliation(s)
- A Y Lee
- Eulji Hospital University of Medicine, Korea
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148
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Choi WJ, Park JG, Yoo SJ, Kim HO, Moon HR, Chun MW, Jung YH, Jeong LS. Syntheses of D- and L-cyclopentenone derivatives using ring-closing metathesis: versatile intermediates for the synthesis of D- and L-carbocyclic nucleosides. J Org Chem 2001; 66:6490-4. [PMID: 11559205 DOI: 10.1021/jo015733w] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- W J Choi
- Laboratory of Medicinal Chemistry, College of Pharmacy, Ewha Woman's University, Seoul 120-750, Korea
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149
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150
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Abstract
The high risk of occupational contact dermatitis in dental personnel are well accepted throughout the world. There are few reports concerning occupational skin disease in dental personnel in Korea. The purposes of this study were to investigate the frequency, characteristics and causative factors of contact dermatitis in Korean dental technicians. Recording of personal history, physical examination and patch tests with the Korean standard series and dental screening series were performed in 49 dental technicians. Most of the subjects were exposed to a variety of compounds, including acrylics, metals, plaster, alginate, etc. 22 (44.9%) subjects had contact dermatitis, present or past, and the site involved was the hand in all 22. The most common clinical feature of hand dermatitis was itching (77.3%); scaling, fissuring and erythema were other common clinical features. Metals, including potassium dichromate (24.5%), nickel sulfate (18.4%), mercury ammonium chloride (16.3%), cobalt chloride (12.2%) and palladium chloride (10.2%), showed high positive rates in patch test results of 49 dental technicians. 7 positive reactions to the various acrylics were found in 3 subjects. In our study, the frequency and clinical features of the contact dermatitis showed a similarity to other reports, though the patch test results were somewhat different; a higher patch-positive reaction to metals and a relatively lower patch-positive reaction to acrylics than the patch test results reported in Europe.
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Affiliation(s)
- J Y Lee
- Department of Dermatology, The Catholic University of Korea, Seoul, Korea
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