Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W± Boson Production in Polarized Proton-Proton Collisions at √s=500 GeV

被引：66

作者：

Aggarwal, M. M. ^{[1
]}

Ahammed, Z. ^{[22
]}

Alakhverdyants, A. V. ^{[18
]}

Alekseev, I. ^{[16
]}

Alford, J. ^{[19
]}

Anderson, B. D. ^{[19
]}

Anson, C. D. ^{[29
]}

Arkhipkin, D. ^{[3
]}

Averichev, G. S. ^{[18
]}

Balewski, J. ^{[23
]}

Beavis, D. R. ^{[3
]}

Bellwied, R. ^{[50
]}

Betancourt, M. J. ^{[23
]}

Betts, R. R. ^{[8
]}

Bhasin, A. ^{[17
]}

Bhati, A. K. ^{[1
]}

Bichsel, H. ^{[49
]}

Bielcik, J. ^{[10
]}

Bielcikova, J. ^{[11
]}

Biritz, B. ^{[6
]}

Bland, L. C. ^{[3
]}

Borowski, W. ^{[41
]}

Bouchet, J. ^{[19
]}

Braidot, E. ^{[27
,28
]}

Brandin, A. V. ^{[26
]}

Bridgeman, A. ^{[2
]}

Brovko, S. G. ^{[5
]}

Bruna, E. ^{[52
]}

Bueltmann, S. ^{[30
]}

Bunzarov, I. ^{[18
]}

Burton, T. P. ^{[3
]}

Cai, X. Z. ^{[40
]}

Caines, H. ^{[52
]}

de la Barca Sanchez, M. Calderon ^{[5
]}

Cebra, D. ^{[5
]}

Cendejas, R. ^{[6
]}

Cervantes, M. C. ^{[42
]}

Chajecki, Z. ^{[29
]}

Chaloupka, P. ^{[11
]}

Chattopadhyay, S. ^{[47
]}

Chen, H. F. ^{[38
]}

Chen, J. H. ^{[40
]}

Chen, J. Y. ^{[51
]}

Cheng, J. ^{[44
]}

Cherney, M. ^{[9
]}

Chikanian, A. ^{[52
]}

Choi, K. E. ^{[34
]}

Christie, W. ^{[3
]}

Chung, P. ^{[11
]}

Codrington, M. J. M. ^{[42
]}

机构：

[1] Panjab Univ, Chandigarh 160014, India

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

[4] Univ Calif Berkeley, Berkeley, CA 94720 USA

[5] Univ Calif Davis, Davis, CA 95616 USA

[6] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[7] Univ Estadual Campinas, Sao Paulo, Brazil

[8] Univ Illinois, Chicago, IL 60607 USA

[9] Creighton Univ, Omaha, NE 68178 USA

[10] Czech Tech Univ, FNSPE, Prague 11519, Czech Republic

[11] Nucl Phys Inst AS CR, Rez 25068, Czech Republic

[12] Goethe Univ Frankfurt, Frankfurt, Germany

[13] Inst Phys, Bhubaneswar 751005, Orissa, India

[14] Indian Inst Technol, Bombay 400076, Maharashtra, India

[15] Indiana Univ, Bloomington, IN 47408 USA

[16] Alikhanov Inst Theoret & Expt Phys, Moscow, Russia

[17] Univ Jammu, Jammu 180001, India

[18] Joint Inst Nucl Res, Dubna 141980, Russia

[19] Kent State Univ, Kent, OH 44242 USA

[20] Univ Kentucky, Lexington, KY 40506 USA

[21] Inst Modern Phys, Lanzhou, Peoples R China

[22] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[23] MIT, Cambridge, MA 02139 USA

[24] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[25] Michigan State Univ, E Lansing, MI 48824 USA

[26] Moscow Engn Phys Inst, Moscow 115409, Russia

[27] NIKHEF, Amsterdam, Netherlands

[28] Univ Utrecht, Amsterdam, Netherlands

[29] Ohio State Univ, Columbus, OH 43210 USA

[30] Old Dominion Univ, Norfolk, VA 23529 USA

[31] Penn State Univ, University Pk, PA 16802 USA

[32] Inst High Energy Phys, Protvino, Russia

[33] Purdue Univ, W Lafayette, IN 47907 USA

[34] Pusan Natl Univ, Pusan 609735, South Korea

[35] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[36] Rice Univ, Houston, TX 77251 USA

[37] Univ Sao Paulo, Sao Paulo, Brazil

[38] Univ Sci & Technol China, Hefei 230026, Peoples R China

[39] Shandong Univ, Jinan 250100, Shandong, Peoples R China

[40] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[41] SUBATECH, Nantes, France

[42] Texas A&M Univ, College Stn, TX 77843 USA

[43] Univ Texas Austin, Austin, TX 78712 USA

[44] Tsinghua Univ, Beijing 100084, Peoples R China

[45] USN Acad, Annapolis, MD 21402 USA

[46] Valparaiso Univ, Valparaiso, IN 46383 USA

[47] Ctr Variable Energy Cyclotron, Kolkata 700064, India

[48] Warsaw Univ Technol, Warsaw, Poland

[49] Univ Washington, Seattle, WA 98195 USA

[50] Wayne State Univ, Detroit, MI 48201 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 06期

基金：

巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

ELECTROMAGNETIC CALORIMETER; DISTRIBUTIONS; PHYSICS;

D O I：

10.1103/PhysRevLett.106.062002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first measurement of the parity-violating single-spin asymmetries for midrapidity decay positrons and electrons from W+ and W- boson production in longitudinally polarized proton-proton collisions at root s = 500 GeV by the STAR experiment at RHIC. The measured asymmetries, A(L)(W+) = -0.27 +/- 0.10(stat.) +/- 0.02(syst.) +/- 0.03(norm.) and A(L)(W-) = 0.14 +/- 0.19(stat.) +/- 0.02(syst.) +/- 0.01(norm.), are consistent with theory predictions, which are large and of opposite sign. These predictions are based on polarized quark and antiquark distribution functions constrained by polarized deep-inelastic scattering measurements.

引用

页数：6

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