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Kim MH, Adriani O, Berti E, Bonechi L, D'Alessandro R, Goto Y, Hong B, Itow Y, Kasahara K, Lee JH, Ljubicic T, Makino Y, Menjo H, Nakagawa I, Ogawa A, Park JS, Sako T, Sakurai N, Sato K, Seidl R, Tanida K, Torii S, Tricomi A, Ueno M, Zhou QD. Transverse Single-Spin Asymmetry for Very Forward Neutral Pion Production in Polarized p+p Collisions at sqrt[s]=510 GeV. PHYSICAL REVIEW LETTERS 2020; 124:252501. [PMID: 32639790 DOI: 10.1103/physrevlett.124.252501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Transverse single-spin asymmetries of very forward neutral pions generated in polarized p+p collisions allow us to understand the production mechanism in terms of perturbative and nonperturbative strong interactions. During 2017, the RHICf Collaboration installed an electromagnetic calorimeter in the zero-degree region of the STAR detector at the Relativistic Heavy Ion Collider (RHIC) and measured neutral pions produced at pseudorapidity larger than 6 in polarized p+p collisions at sqrt[s]=510 GeV. The large nonzero asymmetries increasing both in longitudinal momentum fraction x_{F} and transverse momentum p_{T} have been observed at low transverse momentum p_{T}<1 GeV/c for the first time, at this collision energy. The asymmetries show an approximate x_{F} scaling in the p_{T} region where nonperturbative processes are expected to dominate. A non-negligible contribution from soft processes may be necessary to explain the nonzero neutral pion asymmetries.
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Affiliation(s)
- M H Kim
- Korea University, Seoul 02841, Korea
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
| | - O Adriani
- Department of Physics and Astronomy, University of Florence, Sesto Florentino (FI) I-50019, Italy
- INFN Section of Florence, Sesto Florentino (FI) I-50019, Italy
| | - E Berti
- Department of Physics and Astronomy, University of Florence, Sesto Florentino (FI) I-50019, Italy
- INFN Section of Florence, Sesto Florentino (FI) I-50019, Italy
| | - L Bonechi
- INFN Section of Florence, Sesto Florentino (FI) I-50019, Italy
| | - R D'Alessandro
- Department of Physics and Astronomy, University of Florence, Sesto Florentino (FI) I-50019, Italy
- INFN Section of Florence, Sesto Florentino (FI) I-50019, Italy
| | - Y Goto
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - B Hong
- Korea University, Seoul 02841, Korea
| | - Y Itow
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi 464-8601, Japan
- Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Kasahara
- Shibaura Institue of Technology, 307 Fukasaku, Minuma-ku, Saitama 337-8570, Japan
| | - J H Lee
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - T Ljubicic
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - Y Makino
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - H Menjo
- Graduate school of Science, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - I Nakagawa
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - A Ogawa
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - J S Park
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea
| | - T Sako
- Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
| | - N Sakurai
- Tokushima University, Tokushima, Tokushima 770-8051, Japan
| | - K Sato
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - R Seidl
- RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
- RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - K Tanida
- Advanced Science Research Center, Japan Atomic Energy Agency, 21 2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan
| | - S Torii
- RISE, Waseda University, Shinjuku, Tokyo 162-0044, Japan
| | - A Tricomi
- Department of Physics and Astronomy, University of Catania, Catania I-95123, Italy
- INFN Section of Catania, Catania I-95123, Italy
| | - M Ueno
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Q D Zhou
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Aichi 464-8601, Japan
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Adamczyk L, Adkins J, Agakishiev G, Aggarwal M, Ahammed Z, Alekseev I, Alford J, Anson C, Aparin A, Arkhipkin D, Aschenauer E, Averichev G, Balewski J, Banerjee A, Barber B, Barnovska Z, Beavis D, Bellwied R, Betancourt M, Bhasin A, Bhati A, Bhattarai P, Bichsel H, Bielcik J, Bielcikova J, Bland L, Bordyuzhin I, Borowski W, Bouchet J, Brandin A, Bridgeman A, Brovko S, Bültmann S, Bunzarov I, Burton T, Butterworth J, Caines H, Calderón de la Barca Sánchez M, Cebra D, Cendejas R, Cervantes M, Chaloupka P, Chang Z, Chattopadhyay S, Chen H, Chen J, Chen L, Cheng J, Cherney M, Chikanian A, Christie W, Chwastowski J, Codrington M, Corliss R, Cramer J, Crawford H, Cui X, Das S, Davila Leyva A, De Silva L, Debbe R, Dedovich T, Deng J, Derevschikov A, Derradi de Souza R, Dhamija S, di Ruzza B, Didenko L, Dilks C, Ding F, Dion A, Djawotho P, Dong X, Drachenberg J, Draper J, Du C, Dunkelberger L, Dunlop J, Efimov L, Engelage J, Engle K, Eppley G, Eun L, Evdokimov O, Fatemi R, Fazio S, Fedorisin J, Fersch R, Filip P, Finch E, Fisyak Y, Flores C, Gagliardi C, Gangadharan D, Garand D, Geurts F, Gibson A, Girard M, Gliske S, Grosnick D, et alAdamczyk L, Adkins J, Agakishiev G, Aggarwal M, Ahammed Z, Alekseev I, Alford J, Anson C, Aparin A, Arkhipkin D, Aschenauer E, Averichev G, Balewski J, Banerjee A, Barber B, Barnovska Z, Beavis D, Bellwied R, Betancourt M, Bhasin A, Bhati A, Bhattarai P, Bichsel H, Bielcik J, Bielcikova J, Bland L, Bordyuzhin I, Borowski W, Bouchet J, Brandin A, Bridgeman A, Brovko S, Bültmann S, Bunzarov I, Burton T, Butterworth J, Caines H, Calderón de la Barca Sánchez M, Cebra D, Cendejas R, Cervantes M, Chaloupka P, Chang Z, Chattopadhyay S, Chen H, Chen J, Chen L, Cheng J, Cherney M, Chikanian A, Christie W, Chwastowski J, Codrington M, Corliss R, Cramer J, Crawford H, Cui X, Das S, Davila Leyva A, De Silva L, Debbe R, Dedovich T, Deng J, Derevschikov A, Derradi de Souza R, Dhamija S, di Ruzza B, Didenko L, Dilks C, Ding F, Dion A, Djawotho P, Dong X, Drachenberg J, Draper J, Du C, Dunkelberger L, Dunlop J, Efimov L, Engelage J, Engle K, Eppley G, Eun L, Evdokimov O, Fatemi R, Fazio S, Fedorisin J, Fersch R, Filip P, Finch E, Fisyak Y, Flores C, Gagliardi C, Gangadharan D, Garand D, Geurts F, Gibson A, Girard M, Gliske S, Grosnick D, Guo Y, Gupta A, Gupta S, Guryn W, Haag B, Hajkova O, Hamed A, Han LX, Haque R, Harris J, Hays-Wehle J, He W, Heppelmann S, Hirsch A, Hoffmann G, Hofman D, Horvat S, Huang B, Huang H, Huck P, Humanic T, Igo G, Jacobs W, Jang H, Jena C, Judd E, Kabana S, Kalinkin D, Kang K, Kauder K, Ke H, Keane D, Kechechyan A, Kesich A, Khan Z, Kikola D, Kisel I, Kisiel A, Koetke D, Kollegger T, Konzer J, Koralt I, Korsch W, Kotchenda L, Kravtsov P, Krueger K, Kulakov I, Kumar L, Kycia R, Lamont M, Landgraf J, Landry K, Lauret J, Lebedev A, Lednicky R, Lee J, Leight W, LeVine M, Li C, Li W, Li X, Li X, Li Y, Li Z, Lima L, Lisa M, Liu F, Ljubicic T, Llope W, Longacre R, Luo X, Ma G, Ma Y, Madagodagettige Don D, Mahapatra D, Majka R, Manweiler R, Margetis S, Markert C, Masui H, Matis H, McDonald D, McShane T, Minaev N, Mioduszewski S, Mohanty B, Mondal M, Morozov D, Munhoz M, Mustafa M, Naglis M, Nandi B, Nasim M, Nayak T, Nelson J, Nogach L, Noh S, Nord P, Novak J, Nurushev S, Odyniec G, Ogawa A, Oh K, Ohlson A, Okorokov V, Oldag E, Oliveira R, Olson D, Pachr M, Page B, Pal S, Pan Y, Pandit Y, Panebratsev Y, Pawlak T, Pawlik B, Pei H, Perkins C, Peryt W, Peterson A, Pile P, Planinic M, Pluta J, Plyku D, Pochron W, Poljak N, Porter J, Poskanzer A, Powell C, Pruneau C, Pruthi N, Przybycien M, Pujahari P, Putschke J, Qiu H, Ramachandran S, Raniwala R, Raniwala S, Ray R, Riley C, Ritter H, Roberts J, Rogachevskiy O, Romero J, Ross J, Roy A, Ruan L, Rusnak J, Sahoo N, Sahu P, Sakrejda I, Salur S, Sandacz A, Sandweiss J, Sangaline E, Sarkar A, Schambach J, Scharenberg R, Schaub J, Schmah A, Schmidke W, Schmitz N, Seger J, Selyuzhenkov I, Seyboth P, Shah N, Shahaliev E, Shanmuganathan P, Shao M, Sharma B, Shen W, Shi S, Shou Q, Sichtermann E, Singaraju R, Skoby M, Smirnov D, Smirnov N, Solanki D, Sorensen P, deSouza U, Spinka H, Srivastava B, Stanislaus T, Stevens J, Stock R, Strikhanov M, Stringfellow B, Suaide A, Sumbera M, Sun X, Sun X, Sun Y, Sun Z, Surrow B, Svirida D, Symons T, Szanto de Toledo A, Takahashi J, Tang A, Tang Z, Tarnowsky T, Thomas J, Timmins A, Tlusty D, Tokarev M, Trentalange S, Tribble R, Tribedy P, Trzeciak B, Tsai O, Turnau J, Ullrich T, Underwood D, Van Buren G, van Nieuwenhuizen G, Vanfossen J, Varma R, Vasconcelos G, Vasiliev A, Vertesi R, Videbæk F, Viyogi Y, Vokal S, Voloshin S, Vossen A, Wada M, Walker M, Wang F, Wang G, Wang H, Wang J, Wang Q, Wang X, Wang Y, Wang Y, Webb G, Webb J, Westfall G, Wieman H, Wissink S, Witt R, Wu Y, Xiao Z, Xie W, Xin K, Xu H, Xu N, Xu Q, Xu W, Xu Y, Xu Z, Yan W, Yang C, Yang Y, Yang Y, Ye Z, Yepes P, Yi L, Yip K, Yoo IK, Zawisza Y, Zbroszczyk H, Zha W, Zhang J, Zhang S, Zhang X, Zhang Y, Zhang Z, Zhao F, Zhao J, Zhong C, Zhu X, Zhu Y, Zoulkarneeva Y, Zyzak M. Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions ats=200 GeV. Int J Clin Exp Med 2014. [DOI: 10.1103/physrevd.89.012001] [Show More Authors] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abelev BI, Aggarwal MM, Ahammed Z, Anderson BD, Arkhipkin D, Averichev GS, Bai Y, Balewski J, Barannikova O, Barnby LS, Baudot J, Baumgart S, Beavis DR, Bellwied R, Benedosso F, Betts RR, Bhardwaj S, Bhasin A, Bhati AK, Bichsel H, Bielcik J, Bielcikova J, Bland LC, Blyth SL, Bombara M, Bonner BE, Botje M, Bouchet J, Braidot E, Brandin AV, Bueltmann S, Burton TP, Bystersky M, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Callner J, Catu O, Cebra D, Cervantes MC, Chajecki Z, Chaloupka P, Chattopadhyay S, Chen HF, Chen JH, Chen JY, Cheng J, Cherney M, Chikanian A, Choi KE, Christie W, Chung SU, Clarke RF, Codrington MJM, Coffin JP, Cormier TM, Cosentino MR, Cramer JG, Crawford HJ, Das D, Dash S, Daugherity M, de Moura MM, Dedovich TG, DePhillips M, Derevschikov AA, Derradi de Souza R, Didenko L, Dietel T, Djawotho P, Dogra SM, Dong X, Drachenberg JL, Draper JE, Du F, Dunlop JC, Dutta Mazumdar MR, Edwards WR, Efimov LG, Elhalhuli E, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Eun L, Fachini P, Fatemi R, Fedorisin J, Feng A, Filip P, Finch E, Fine V, Fisyak Y, Fu J, Gagliardi CA, Gaillard L, Ganti MS, Garcia-Solis E, Ghazikhanian V, et alAbelev BI, Aggarwal MM, Ahammed Z, Anderson BD, Arkhipkin D, Averichev GS, Bai Y, Balewski J, Barannikova O, Barnby LS, Baudot J, Baumgart S, Beavis DR, Bellwied R, Benedosso F, Betts RR, Bhardwaj S, Bhasin A, Bhati AK, Bichsel H, Bielcik J, Bielcikova J, Bland LC, Blyth SL, Bombara M, Bonner BE, Botje M, Bouchet J, Braidot E, Brandin AV, Bueltmann S, Burton TP, Bystersky M, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Callner J, Catu O, Cebra D, Cervantes MC, Chajecki Z, Chaloupka P, Chattopadhyay S, Chen HF, Chen JH, Chen JY, Cheng J, Cherney M, Chikanian A, Choi KE, Christie W, Chung SU, Clarke RF, Codrington MJM, Coffin JP, Cormier TM, Cosentino MR, Cramer JG, Crawford HJ, Das D, Dash S, Daugherity M, de Moura MM, Dedovich TG, DePhillips M, Derevschikov AA, Derradi de Souza R, Didenko L, Dietel T, Djawotho P, Dogra SM, Dong X, Drachenberg JL, Draper JE, Du F, Dunlop JC, Dutta Mazumdar MR, Edwards WR, Efimov LG, Elhalhuli E, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Eun L, Fachini P, Fatemi R, Fedorisin J, Feng A, Filip P, Finch E, Fine V, Fisyak Y, Fu J, Gagliardi CA, Gaillard L, Ganti MS, Garcia-Solis E, Ghazikhanian V, Ghosh P, Gorbunov YN, Gordon A, Gos H, Grebenyuk O, Grosnick D, Grube B, Guertin SM, Guimaraes KSFF, Gupta A, Gupta N, Guryn W, Haag B, Hallman TJ, Hamed A, Harris JW, He W, Heinz M, Henry TW, Heppelmann S, Hippolyte B, Hirsch A, Hjort E, Hoffman AM, Hoffmann GW, Hofman DJ, Hollis RS, Horner MJ, Huang HZ, Hughes EW, Humanic TJ, Igo G, Iordanova A, Jacobs P, Jacobs WW, Jakl P, Jin F, Jones PG, Judd EG, Kabana S, Kajimoto K, Kang K, Kapitan J, Kaplan M, Keane D, Kechechyan A, Kettler D, Khodyrev VY, Kiryluk J, Kisiel A, Klein SR, Knospe AG, Kocoloski A, Koetke DD, Kollegger T, Kopytine M, Kotchenda L, Kouchpil V, Kowalik KL, Kravtsov P, Kravtsov VI, Krueger K, Kuhn C, Kumar A, Kurnadi P, Lamont MAC, Landgraf JM, Langdon J, Lange S, LaPointe S, Laue F, Lauret J, Lebedev A, Lednicky R, Lee CH, LeVine MJ, Li C, Li Q, Li Y, Lin G, Lin X, Lindenbaum SJ, Lisa MA, Liu F, Liu H, Liu J, Liu L, Ljubicic T, Llope WJ, Longacre RS, Love WA, Lu Y, Ludlam T, Lynn D, Ma GL, Ma JG, Ma YG, Mahapatra DP, Majka R, Mangotra LK, Manweiler R, Margetis S, Markert C, Matis HS, Matulenko YA, McShane TS, Meschanin A, Millane J, Miller C, Miller ML, Minaev NG, Mioduszewski S, Mischke A, Mitchell J, Mohanty B, Morozov DA, Munhoz MG, Nandi BK, Nattrass C, Nayak TK, Nelson JM, Nepali C, Netrakanti PK, Ng MJ, Nogach LV, Nurushev SB, Odyniec G, Ogawa A, Okada H, Okorokov V, Olson D, Pachr M, Pal SK, Panebratsev Y, Pavlinov AI, Pawlak T, Peitzmann T, Perevoztchikov V, Perkins C, Peryt W, Phatak SC, Planinic M, Pluta J, Poljak N, Porile N, Poskanzer AM, Potekhin M, Potukuchi BVKS, Prindle D, Pruneau C, Pruthi NK, Putschke J, Qattan IA, Rakness G, Raniwala R, Raniwala S, Ray RL, Relyea D, Ridiger A, Ritter HG, Roberts JB, Rogachevskiy OV, Romero JL, Rose A, Roy C, Ruan L, Russcher MJ, Rykov V, Sahoo R, Sakrejda I, Sakuma T, Salur S, Sandweiss J, Sarsour M, Schambach J, Scharenberg RP, Schmitz N, Seger J, Selyuzhenkov I, Seyboth P, Shabetai A, Shahaliev E, Shao M, Sharma M, Shi XH, Sichtermann EP, Simon F, Singaraju RN, Skoby MJ, Smirnov N, Snellings R, Sorensen P, Sowinski J, Speltz J, Spinka HM, Srivastava B, Stadnik A, Stanislaus TDS, Staszak D, Stock R, Strikhanov M, Stringfellow B, Suaide AAP, Suarez MC, Subba NL, Sumbera M, Sun XM, Sun Z, Surrow B, Symons TJM, Szanto de Toledo A, Takahashi J, Tang AH, Tang Z, Tarnowsky T, Tatarowicz J, Thein D, Thomas JH, Tian J, Timmins AR, Timoshenko S, Tokarev M, Trainor TA, Tram VN, Trattner AL, Trentalange S, Tribble RE, Tsai OD, Ulery J, Ullrich T, Underwood DG, Van Buren G, van der Kolk N, van Leeuwen M, Vander Molen AM, Varma R, Vasconcelos GMS, Vasilevski IM, Vasiliev AN, Vernet R, Videbaek F, Vigdor SE, Viyogi YP, Vokal S, Voloshin SA, Wada M, Waggoner WT, Wang F, Wang G, Wang JS, Wang Q, Wang X, Wang XL, Wang Y, Webb JC, Westfall GD, Whitten C, Wieman H, Wissink SW, Witt R, Wu J, Wu Y, Xu N, Xu QH, Xu Z, Yepes P, Yoo IK, Yue Q, Zachariou N, Zawisza M, Zhan W, Zhang H, Zhang S, Zhang WM, Zhang Y, Zhang ZP, Zhao Y, Zhong C, Zhou J, Zoulkarneev R, Zoulkarneeva Y, Zuo JX. Forward neutral-pion transverse single-spin asymmetries in p + p collisions at sqrt[s] = 200 GeV. PHYSICAL REVIEW LETTERS 2008; 101:222001. [PMID: 19113478 DOI: 10.1103/physrevlett.101.222001] [Show More Authors] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2008] [Indexed: 05/27/2023]
Abstract
We report precision measurements of the Feynman x (xF) dependence, and first measurements of the transverse momentum (pT) dependence, of transverse single-spin asymmetries for the production of pi0 mesons from polarized proton collisions at sqrt[s] = 200 GeV. The xF dependence of the results is in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the pT dependence at fixed xF are not consistent with these same perturbative QCD-based calculations.
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Affiliation(s)
- B I Abelev
- University of Illinois at Chicago, Chicago, Illinois 60607, USA
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Adams J, Adler C, Aggarwal MM, Ahammed Z, Amonett J, Anderson BD, Anderson M, Arkhipkin D, Averichev GS, Badyal SK, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bezverkhny BI, Bhardwaj S, Bhaskar P, Bhati AK, Bichsel H, Billmeier A, Bland LC, Blyth CO, Bonner BE, Botje M, Boucham A, Brandin A, Bravar A, Cadman RV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Carroll J, Castillo J, Castro M, Cebra D, Chaloupka P, Chattopadhyay S, Chen HF, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Christie W, Coffin JP, Cormier TM, Cramer JG, Crawford HJ, Das D, Das S, Derevschikov AA, Didenko L, Dietel T, Dong WJ, Dong X, Draper JE, Du F, Dubey AK, Dunin VB, Dunlop JC, Dutta Majumdar MR, Eckardt V, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Fachini P, Faine V, Faivre J, Fatemi R, Filimonov K, Filip P, Finch E, Fisyak Y, Flierl D, Foley KJ, Fu J, Gagliardi CA, Gagunashvili N, Gans J, Ganti MS, Gaudichet L, Germain M, Geurts F, Ghazikhanian V, Ghosh P, Gonzalez JE, Grachov O, Grigoriev V, Gronstal S, Grosnick D, Guedon M, Guertin SM, Gupta A, et alAdams J, Adler C, Aggarwal MM, Ahammed Z, Amonett J, Anderson BD, Anderson M, Arkhipkin D, Averichev GS, Badyal SK, Balewski J, Barannikova O, Barnby LS, Baudot J, Bekele S, Belaga VV, Bellwied R, Berger J, Bezverkhny BI, Bhardwaj S, Bhaskar P, Bhati AK, Bichsel H, Billmeier A, Bland LC, Blyth CO, Bonner BE, Botje M, Boucham A, Brandin A, Bravar A, Cadman RV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Carroll J, Castillo J, Castro M, Cebra D, Chaloupka P, Chattopadhyay S, Chen HF, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Christie W, Coffin JP, Cormier TM, Cramer JG, Crawford HJ, Das D, Das S, Derevschikov AA, Didenko L, Dietel T, Dong WJ, Dong X, Draper JE, Du F, Dubey AK, Dunin VB, Dunlop JC, Dutta Majumdar MR, Eckardt V, Efimov LG, Emelianov V, Engelage J, Eppley G, Erazmus B, Estienne M, Fachini P, Faine V, Faivre J, Fatemi R, Filimonov K, Filip P, Finch E, Fisyak Y, Flierl D, Foley KJ, Fu J, Gagliardi CA, Gagunashvili N, Gans J, Ganti MS, Gaudichet L, Germain M, Geurts F, Ghazikhanian V, Ghosh P, Gonzalez JE, Grachov O, Grigoriev V, Gronstal S, Grosnick D, Guedon M, Guertin SM, Gupta A, Gushin E, Gutierrez TD, Hallman TJ, Hardtke D, Harris JW, Heinz M, Henry TW, Heppelmann S, Herston T, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Huang HZ, Huang SL, Humanic TJ, Igo G, Ishihara A, Jacobs P, Jacobs WW, Janik M, Jiang H, Johnson I, Jones PG, Judd EG, Kabana S, Kaneta M, Kaplan M, Keane D, Khodyrev VY, Kiryluk J, Kisiel A, Klay J, Klein SR, Klyachko A, Koetke DD, Kollegger T, Kopytine M, Kotchenda L, Kovalenko AD, Kramer M, Kravtsov P, Kravtsov VI, Krueger K, Kuhn C, Kulikov AI, Kumar A, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lamont MAC, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lauret J, Lebedev A, Lednický R, LeVine MJ, Li C, Li Q, Lindenbaum SJ, Lisa MA, Liu F, Liu L, Liu Z, Liu 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Retiere F, Ridiger A, Ritter HG, Roberts JB, Rogachevski OV, Romero JL, Rose A, Roy C, Ruan LJ, Sahoo R, Sakrejda I, Salur S, Sandweiss J, Savin I, Schambach J, Scharenberg RP, Schmitz N, Schroeder LS, Schweda K, Seger J, Seliverstov D, Seyboth P, Shahaliev E, Shao M, Sharma M, Shestermanov KE, Shimanskii SS, Singaraju RN, Simon F, Skoro G, Smirnov N, Snellings R, Sood G, Sorensen P, Sowinski J, Spinka HM, Srivastava B, Stanislaus S, Stock R, Stolpovsky A, Strikhanov M, Stringfellow B, Struck C, Suaide AAP, Sugarbaker E, Suire C, Sumbera M, Surrow B, Symons TJM, Szanto de Toledo A, Szarwas P, Tai A, Takahashi J, Tang AH, Thein D, Thomas JH, Tikhomirov V, Tokarev M, Tonjes MB, Trainor TA, Trentalange S, Tribble RE, Trivedi MD, Trofimov V, Tsai O, Ullrich T, Underwood DG, Van Buren G, VanderMolen AM, Vasiliev AN, Vasiliev M, Vigdor SE, Viyogi YP, Voloshin SA, Waggoner W, Wang F, Wang G, Wang XL, Wang ZM, Ward H, Watson JW, Wells R, Westfall GD, Whitten C, Wieman H, Willson R, Wissink SW, Witt R, Wood J, Wu J, Xu N, Xu Z, Xu ZZ, Yamamoto E, Yepes P, Yurevich VI, Zanevski YV, Zborovský I, Zhang H, Zhang WM, Zhang ZP, Zołnierczuk PA, Zoulkarneev R, Zoulkarneeva J, Zubarev AN. Cross sections and transverse single-spin asymmetries in forward neutral-pion production from proton collisions at sqrt[s]=200 GeV. PHYSICAL REVIEW LETTERS 2004; 92:171801. [PMID: 15169138 DOI: 10.1103/physrevlett.92.171801] [Show More Authors] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2003] [Indexed: 05/24/2023]
Abstract
Measurements of the production of forward high-energy pi(0) mesons from transversely polarized proton collisions at sqrt[s]=200 GeV are reported. The cross section is generally consistent with next-to-leading order perturbative QCD calculations. The analyzing power is small at x(F) below about 0.3, and becomes positive and large at higher x(F), similar to the trend in data at sqrt[s]< or =20 GeV. The analyzing power is in qualitative agreement with perturbative QCD model expectations. This is the first significant spin result seen for particles produced with p(T)>1 GeV/c at a polarized proton collider.
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Affiliation(s)
- J Adams
- University of Birmingham, Birmingham, United Kingdom
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Saroff S, Baller BR, Blazey GC, Courant H, Heller KJ, Marshak ML, Shupe MA, Barton DS, Bunce G, Carroll AS, Gushue S, Makdisi YI, Remsberg L, Heppelmann S, Russell JJ. Single-spin asymmetry in inclusive reactions p. PHYSICAL REVIEW LETTERS 1990; 64:995-998. [PMID: 10042136 DOI: 10.1103/physrevlett.64.995] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Carey DC, Coleman RN, Corcoran MD, Cossairt JD, Derevschikov AA, Grosnick DP, Hill D, Imai K, Konaka A, Kuroda K, Lehar F, Lopiano D, Luehring FC, Maki T, Makino S, Masaike A, Matulenko YA, Meschanin AP, Michalowicz A, Miller DH, Miyake K, Nagamine T, Nakano T, Nessi-Tedaldi F, Nessi M, Nguyen C, Nurushev SB, Ohashi Y, Pauletta G, Penzo A, Phillips GC, Read AL, Roberts JB, Salvato G, Schiavon P, Shima T, Solovyanov VL, Spinka H, Stanek RW, Takashima R, Takeutchi F, Tamura N, Tanaka N, Underwood DG, Vasiliev AN, Villari A, White JL, Yokosawa A, Yoshida T, Zanetti A. Measurement of the analyzing power in the Primakoff process with a high-energy polarized proton beam. PHYSICAL REVIEW LETTERS 1990; 64:357-360. [PMID: 10041959 DOI: 10.1103/physrevlett.64.357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bonner BE, Buchanan JA, Clement JM, Corcoran MD, Krishna NM, Kruk JW, Miettinen HE, Moss RM, Mutchler GS, Nessi-Tedaldi F, Nessi M, Phillips GC, Roberts JB, Stevenson PM, Tonse SR, Birman A, Chung SU, Etkin A, Fernow RC, Kirk H, Protopopescu SD, Willutzki H, Hallman T, Madansky L, Bar-Yam Z, Dowd J, Kern W, King E, Mayes BW, Pinsky LS. Analyzing power of inclusive production of pi +, pi -, and KS0 by polarized protons at 13.3 and 18.5 GeV/c. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1990; 41:13-16. [PMID: 10012181 DOI: 10.1103/physrevd.41.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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