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Abstract
Standard lattice calculations in kaon physics are based on the evaluation of matrix elements of local operators between two single-hadron states or a single-hadron state and the vacuum. Recent progress in lattice QCD has gone beyond these standard observables. I will review the status and prospects of lattice kaon physics with an emphasis on non-leptonic K → ππ decay and long-distance processes including K0-K0 mixing and rare kaon decays.
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Adler S, Bazarko AO, Bergbusch PC, Blackmore EW, Bryman DA, Chen S, Chiang IH, Diwan MV, Frank JS, Fujiwara T, Haggerty JS, Hu J, Inagaki T, Ito MM, Jaffe DE, Jain V, Kabe S, Kettell SH, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Li KK, Littenberg LS, Macdonald JA, Meyers PD, Mildenberger J, Miyajima M, Muramatsu N, Nakano T, Ng C, Ng S, Nomura T, Numao T, Poutissou JM, Poutissou R, Redlinger G, Sato T, Shimada K, Shimoyama T, Shinkawa T, Shoemaker FC, Stone JR, Strand RC, Sugimoto S, Tamagawa Y, Tsunemi T, Witzig C, Yoshimura Y. Measurement of theK+→π0μ+νμγbranching ratio. Int J Clin Exp Med 2010. [DOI: 10.1103/physrevd.81.092001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Buras AJ, Gorbahn M, Haisch U, Nierste U. Rare decay K+ --> pi+ nunu at the next-to-next-to-leading order in QCD. Phys Rev Lett 2005; 95:261805. [PMID: 16486344 DOI: 10.1103/physrevlett.95.261805] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Indexed: 05/06/2023]
Abstract
We calculate the charm quark contribution to the rare decay Kappa(+)--> pi(+) nunu in the next-to-next-to-leading order of QCD. This new contribution reduces the theoretical uncertainty in the relevant parameter Pc from +/-10.1% down to +/-2.4%, corresponding to scale uncertainties of +/-1.3%, +/-1.0%, +/-0.006, and +/-1.2 degrees in Beta(Kappa(+) --> pi(+) nunu) and in |V(td)|, sin2(Beta), and gamma extracted from the Kappa --> pinunu system. The error in Rho(c) = 0.37 +/- 0.04 is now fully dominated by the current uncertainty of +/-3.8% in the charm quark mass m(c). We find Beta(Kappa(+) --> pi(+)nunu) = (8.0 +/- 1.1) x 10(-11), where the quoted error stems almost entirely from the present uncertainties in m(c) and the Cabibbo-Kobayashi-Maskawa elements.
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Affiliation(s)
- Andrzej J Buras
- Physik Department, Technische Universität München, Garching, Germany
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Anisimovsky VV, Artamonov AV, Bassalleck B, Bhuyan B, Blackmore EW, Bryman DA, Chen S, Chiang IH, Christidi IA, Cooper PS, Diwan MV, Frank JS, Fujiwara T, Hu J, Ivashkin AP, Jaffe DE, Kabe S, Kettell SH, Khabibullin MM, Khotjantsev AN, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kozhevnikov AP, Kudenko YG, Kushnirenko A, Landsberg LG, Lewis B, Li KK, Littenberg LS, Macdonald JA, Mildenberger J, Mineev OV, Miyajima M, Mizouchi K, Mukhin VA, Muramatsu N, Nakano T, Nomachi M, Nomura T, Numao T, Obraztsov VF, Omata K, Patalakha DI, Petrenko SV, Poutissou R, Ramberg EJ, Redlinger G, Sato T, Sekiguchi T, Shinkawa T, Strand RC, Sugimoto S, Tamagawa Y, Tschirhart R, Tsunemi T, Vavilov DV, Viren B, Yershov NV, Yoshimura Y, Yoshioka T. Improved measurement of the K+-->pi+nunu; branching ratio. Phys Rev Lett 2004; 93:031801. [PMID: 15323812 DOI: 10.1103/physrevlett.93.031801] [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: 03/19/2004] [Indexed: 05/24/2023]
Abstract
An additional event near the upper kinematic limit for K+-->pi(+)nunu; has been observed by experiment E949 at Brookhaven National Laboratory. Combining previously reported and new data, the branching ratio is B(K+-->pi(+)nunu;)=(1.47(+1.30)(-0.89))x10(-10) based on three events observed in the pion momentum region 211<P<229 MeV/c. At the measured central value of the branching ratio, the additional event had a signal-to-background ratio of 0.9.
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Affiliation(s)
- V V Anisimovsky
- Institute for Nuclear Research RAS, 60 October Revolution Prospect 7a, 117312 Moscow, Russia
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Adler S, Aoki M, Ardebili M, Atiya MS, Bazarko AO, Bergbusch PC, Blackmore EW, Bryman DA, Chiang IH, Convery MR, Diwan MV, Frank JS, Haggerty JS, Inagaki T, Ito MM, Jain V, Kabe S, Kazumori M, Kettell SH, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Kycia TF, Li KK, Littenberg LS, Macdonald JA, McPherson RA, Meyers PD, Mildenberger J, Miyajima M, Muramatsu N, Nakano T, Ng C, Nishide J, Numao T, Otomo A, Poutissou JM, Poutissou R, Redlinger G, Sasaki T, Sato T, Shinkawa T, Shoemaker FC, Soluk R, Stone JR, Strand RC, Sugimoto S, Tamagawa Y, Witzig C, Yoshimura Y. Search for the rare decayK+→π+γ. Int J Clin Exp Med 2002. [DOI: 10.1103/physrevd.65.052009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Adler S, Bazarko AO, Bergbusch PC, Blackmore EW, Bryman DA, Chen S, Chiang IH, Diwan MV, Frank JS, Haggerty JS, Hu J, Inagaki T, Ito M, Jain V, Kabe S, Kettell SH, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Li KK, Littenberg LS, Macdonald JA, Meyers PD, Mildenberger J, Miyajima M, Muramatsu N, Nakano T, Ng C, Ng S, Numao T, Poutissou JM, Poutissou R, Redlinger G, Sato T, Shimada K, Shimoyama T, Shinkawa T, Shoemaker FC, Stone JR, Strand RC, Sugimoto S, Tamagawa Y, Witzig C, Yoshimura Y. Further evidence for the decay K+ -->pi+nu(nu). Phys Rev Lett 2002; 88:041803. [PMID: 11801107 DOI: 10.1103/physrevlett.88.041803] [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: 11/02/2001] [Indexed: 05/23/2023]
Abstract
Additional evidence for the rare kaon decay K+-->pi+nu(nu) has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211<P<229 MeV/c, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute 0.15+/-0.05 events. The branching ratio is B(K+-->pi+nu(nu)) = 1.57(+1.75)(-0.82)x10(-10).
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Affiliation(s)
- S Adler
- Brookhaven National Laboratory, Upton, New York 11973
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Frampton PH, Glashow SL, Yoshikawa T. Model of soft CP violation using scalars with quark number two. Phys Rev Lett 2001; 87:011801. [PMID: 11461459 DOI: 10.1103/physrevlett.87.011801] [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: 03/02/2001] [Indexed: 05/23/2023]
Abstract
We propose a model of soft CP violation that evades the strong CP problem and can describe observed CP violation in the neutral kaon sector, both direct and indirect. Our model requires two "duark" mesons carrying quark number two that have complex (CP-violating) bare masses and are coupled to quark pairs. Aside from the existence of these potentially observable new particles with masses of several hundred GeV, we predict a flat unitarity triangle (i.e., no observable direct CP violation in the B-meson sector) and a possibly anomalous branching ratio for the decay mode K+-->pi(+)+nu(nu).
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Affiliation(s)
- P H Frampton
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255, USA
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Adler S, Aoki M, Ardebili M, Atiya MS, Bergbusch PC, Blackmore EW, Bryman DA, Chiang IH, Convery MR, Diwan MV, Frank JS, Haggerty JS, Inagaki T, Ito MM, Kabe S, Kettell SH, Kishi Y, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Kycia TF, Li KK, Littenberg LS. Measurement of direct photon emission in K+-->pi(+)pi(0)gamma decay. Phys Rev Lett 2000; 85:4856-4859. [PMID: 11102135 DOI: 10.1103/physrevlett.85.4856] [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: 07/13/2000] [Indexed: 05/23/2023]
Abstract
We have performed a measurement of the K+-->pi(+)pi(0)gamma decay and have observed 2x10(4) events. The best fit to the decay spectrum gives a branching ratio for direct photon emission of (4.7+/-0.8+/-0. 3)x10(-6) in the pi(+) kinetic energy region of 55 to 90 MeV and requires no component due to interference with inner bremsstrahlung.
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Affiliation(s)
- S Adler
- Brookhaven National Laboratory (BNL), Upton, New York 11973, USA
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