Measurement Of The Parity-Violating Longitudinal Single-Spin Asymmetry For W-+/- Boson Production In Polarized Proton-Proton Collisions At Root S=500 Gev
M. M. Aggarwal,Z. Ahammed,A. V. Alakhverdyants,I. Alekseev,J. Alford,B. D. Anderson,C. D. Anson,D. Arkhipkin,G. S. Averichev,J. Balewski,D. R. Beavis,R. Bellwied,M. J. Betancourt,R. R. Betts,A. Bhasin,A. K. Bhati,H. Bichsel,J. Bielcik,J. Bielcikova,B. Biritz,L. C. Bland,W. Borowski,J. Bouchet,E. Braidot,A. V. Brandin,A. Bridgeman,S. G. Brovko,E. Bruna,S. Bueltmann,I. Bunzarov,T. P. Burton,X. Z. Cai,H. Caines,M. Calderon De La Barca Sanchez,D. Cebra,R. Cendejas,M. C. Cervantes,Z. Chajecki,P. Chaloupka,S. Chattopadhyay,H. F. Chen,J. H. Chen,J. Y. Chen,J. Cheng,M. Cherney,A. Chikanian,K. E. Choi,W. Christie,P. Chung,M. J. M. Codrington,R. Corliss,J. G. Cramer,H. J. Crawford,S. Dash,A. Davila Leyva,L. C. De Silva,R. R. Debbe,T. G. Dedovich,A. A. Derevschikov,R. Derradi De Souza,L. Didenko,P. Djawotho,S. M. Dogra,X. Dong,J. L. Drachenberg,J. E. Draper,J. C. Dunlop,M. R. Dutta Mazumdar,L. G. Efimov,M. Elnimr,J. Engelage,G. Eppley,B. Erazmus,M. Estienne,L. Eun,O. Evdokimov,R. Fatemi,J. Fedorisin,R. G. Fersch,E. Finch,V. Fine,Y. Fisyak,C. A. Gagliardi,D. R. Gangadharan,M. S. Ganti,A. Geromitsos,F. Geurts,P. Ghosh,Y. N. Gorbunov,A. Gordon,O. Grebenyuk,D. Grosnick,S. M. Guertin,A. Gupta,W. Guryn,B. Haag,A. Hamed,L-X. Han,J. W. Harris,J. P. Hays-Wehle,M. Heinz,S. Heppelmann,A. Hirsch,E. Hjort,G. W. Hoffmann,D. J. Hofman,B. Huang,H. Z. Huang,T. J. Humanic,L. Huo,G. Igo,P. Jacobs,W. W. Jacobs,C. Jena,F. Jin,J. Joseph,E. G. Judd,S. Kabana,K. Kang,J. Kapitan,K. Kauder,D. Keane,A. Kechechyan,D. Kettler,D. P. Kikola,J. Kiryluk,A. Kisiel,V. Kizka,S. R. Klein,A. G. Knospe,A. Kocoloski,D. D. Koetke,T. Kollegger,J. Konzer,I. Koralt,L. Koroleva,W. Korsch,L. Kotchenda,V. Kouchpil,P. Kravtsov,K. Krueger,M. Krus,L. Kumar,P. Kurnadi,M. A. C. Lamont,J. M. Landgraf,S. Lapointe,J. Lauret,A. Lebedev,R. Lednicky,C-H. Lee,J. H. Lee,W. Leight,M. J. Levine,C. Li,L. Li,N. Li,W. Li,X. Li,Y. Li,Z. M. Li,M. A. Lisa,F. Liu,H. Liu,J. Liu,T. Ljubicic,W. J. Llope,R. S. Longacre,W. A. Love,Y. Lu,E. V. Lukashov,X. Luo,G. L. Ma,Y. G. Ma,D. P. Mahapatra,R. Majka,O. I. Mall,L. K. Mangotra,R. Manweiler,S. Margetis,C. Markert,H. Masui,H. S. Matis,Yu. A. Matulenko,D. Mcdonald,T. S. Mcshane,A. Meschanin,R. Milner,N. G. Minaev,S. Mioduszewski,A. Mischke,M. K. Mitrovski,B. Mohanty,M. M. Mondal,B. Morozov,D. A. Morozov,M. G. Munhoz,M. Naglis,B. K. Nandi,T. K. Nayak,P. K. Netrakanti,M. J. Ng,L. V. Nogach,S. B. Nurushev,G. Odyniec,A. Ogawa,A. Ohlson,V. Okorokov,E. W. Oldag,D. Olson,M. Pachr,B. S. Page,S. K. Pal,Y. Pandit,Y. Panebratsev,T. Pawlak,T. Peitzmann,C. Perkins,W. Peryt,S. C. Phatak,P. Pile,M. Planinic,M. A. Ploskon,J. Pluta,D. Plyku,N. Poljak,A. M. Poskanzer,B. V. K. S. Potukuchi,C. B. Powell,D. Prindle,C. Pruneau,N. K. Pruthi,P. R. Pujahari,J. Putschke,H. Qiu,R. Raniwala,S. Raniwala,R. L. Ray,R. Redwine,R. Reed,H. G. Ritter,J. B. Roberts,O. V. Rogachevskiy,J. L. Romero,A. Rose,L. Ruan,S. Sakai,I. Sakrejda,T. Sakuma,S. Salur,J. Sandweiss,E. Sangaline,J. Schambach,R. P. Scharenberg,A. M. Schmah,N. Schmitz,T. R. Schuster,J. Seele,J. Seger,I. Selyuzhenkov,P. Seyboth,E. Shahaliev,M. Shao,M. Sharma,S. S. Shi,E. P. Sichtermann,F. Simon,R. N. Singaraju,M. J. Skoby,N. Smirnov,P. Sorensen,H. M. Spinka,B. Srivastava,T. D. S. Stanislaus,D. Staszak,J. R. Stevens,R. Stock,M. Strikhanov,B. Stringfellow,A. A. P. Suaide,M. C. Suarez,N. L. Subba,M. Sumbera,X. M. Sun,Y. Sun,Z. Sun,B. Surrow,D. N. Svirida,T. J. M. Symons,A. Szanto De Toledo,J. Takahashi,A. H. Tang,Z. Tang,L. H. Tarini,T. Tarnowsky,D. Thein,J. H. Thomas,J. Tian,A. R. Timmins,S. Timoshenko,D. Tlusty,M. Tokarev,T. A. Trainor,V. N. Tram,S. Trentalange,R. E. Tribble,O. D. Tsai,T. Ullrich,D. G. Underwood,G. Van Buren,M. Van Leeuwen,G. Van Nieuwenhuizen,J. A. Vanfossen,R. Varma,G. M. S. Vasconcelos,A. N. Vasiliev,F. Videbk,Y. P. Viyogi,S. Vokal,S. A. Voloshin,M. Wada,M. Walker,F. Wang,G. Wang,H. Wang,J. S. Wang,Q. Wang,X. L. Wang,Y. Wang,G. Webb,J. C. Webb,G. D. Westfall,C. Whitten,H. Wieman,S. W. Wissink,R. Witt,Y. F. Wu,W. Xie,H. Xu,N. Xu,Q. H. Xu,W. Xu,Y. Xu,Z. Xu,L. Xue,Y. Yang,P. Yepes,K. Yip,I-K. Yoo,Q. Yue,M. Zawisza,H. Zbroszczyk,W. Zhan,J. B. Zhang,S. Zhang,W. M. Zhang,X. P. Zhang,Y. Zhang,Z. P. Zhang,J. Zhao,C. Zhong,W. Zhou,X. Zhu,Y. H. Zhu,R. Zoulkarneev,Y. Zoulkarneeva
PHYSICAL REVIEW LETTERS（2011）
引用102|浏览5
暂无评分
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.
更多
查看译文
关键词
W and Z bosons,Boson,Proton,Elementary particle,Antiparticle,Lepton,Deep inelastic scattering,Inelastic scattering,Nuclear physics,Particle physics,Physics
