Measurement of the Transverse Single-Spin Asymmetry in p↑+p→W±/Z0 at RHIC

L. Adamczyk,J. K. Adkins,G. Agakishiev,Madan Mohan Aggarwal,Zubayer Ahammed,I. Alekseev,A. Aparin,D. Arkhipkin,E. C. Aschenauer,Anjali Attri,G. S. Averichev,X. Bai,V. Bairathi,A. Banerjee,Rene Bellwied,Anju Bhasin,A. K. Bhati,P. Bhattarai,J. Bielcik,J. Bielcikova,L. C. Bland,I. G. Bordyuzhin,J. Bouchet,J. D. Brandenburg,A. V. Brandin,I. Bunzarov,J. Butterworth,Helen Louise Caines,M. Calderon De La Barca Sanchez,J. M. Campbell,D. Cebra,I. Chakaberia,P. Chaloupka,Z. Chang,Sukalyan Chattopadhyay,X. Chen,Jian Chen,J. Cheng,Michael G. Cherney,W. Christie,Giacomo Contin,H. J. Crawford,S. Das,L. C. De Silva,Ramiro Debbe,T. G. Dedovich,Jun Deng,A. A. Derevschikov,B. Di Ruzza,L. Didenko,C. Dilks,X. Dong,J. L. Drachenberg,J. E. Draper,C. M. Du,L. E. Dunkelberger,J. C. Dunlop,L. G. Efimov,J. Engelage,G. Eppley,R. Esha,O. Evdokimov,O. Eyser,R. Fatemi,S. Fazio,Pavol Federic,J. Fedorisin,Z. Feng,P. Filip,Y. Fisyak,C. E. Flores,Łukasz Fulek,C. A. Gagliardi,D. Garand,F. J. M. Geurts,A. Gibson,M. R. Girard,Leo Clifford Greiner,D. Grosnick,D. S. Gunarathne,Yuzhu Guo,A. Gupta,S K Gupta,W. Guryn,Ayman Hamad,A. Hamed,R. Haque,J. W. Harris,Liang He,S. Heppelmann,A. S. Hirsch,G. W. Hoffmann,D. J. Hofman,S. Horvat,X. Huang,H. Z. Huang,B. Huang,Te-Chuan Huang,P. Huck,T. J. Humanic,G. Igo,W. W. Jacobs,H J Jang,Alexander Jentsch,J. Jia,Kun Jiang,E. G. Judd,S. Kabana,Dmitry Kalinkin,K. Kang,K. Kauder,H. W. Ke,D. Keane,A. Kechechyan,Z. H. Khan,Daniel Kikola,Ivan Kisel,A. Kisiel,L. Kochenda,D. D. Koetke,Leszek Kosarzewski,A. F. Kraishan,P. Kravtsov,K. Krueger,Lokesh Kumar,Mac Lamont,J. M. Landgraf,K. D. Landry,J. Lauret,A. Lebedev,R. Lednický,J. H. Lee,C. Li,Y. Li,W. G. Li,Xiaoguang Li,T. Lin,M. A. Lisa,F. H. Liu,T. Ljubicic,William Llope,M. Lomnitz,R. S. Longacre,Xiaofeng Luo,Rongrong Ma,L. Ma,G. L. Ma,Y. G. Ma,Niseem Magdy,Richard Daniel Majka,A. Manion,S. Margetis,Christina Markert,Donald M. McDonald,K. Meehan,Jie Mei,N. G. Minaev,S. Mioduszewski,D. K. Mishra,Bedangadas Mohanty,M M Mondal,D A Morozov,M. K. Mustafa,Basanta Kumar Nandi,Nasim,Tapan Kumar Nayak,Grigory Nigmatkulov,Takafumi Niida,L. V. Nogach,Sy Noh,J. Novak,S. B. Nurushev,G. Odyniec,A. Ogawa,K. Oh,V. A. Okorokov,D. L. Olvitt,B. S. Page,R. Pak,Y. X. Pan,Y. Pandit,Y. Panebratsev,B. Pawlik,Hua Pei,C. Perkins,P. Pile,Jan Marian Pluta,K. Poniatowska,J. Porter,Matthew Posik,A. M. Poskanzer,N. K. Pruthi,J. Putschke,H. Qiu,A. Quintero,S. Ramachandran,Rashmi Raniwala,Sudhir Raniwala,R. L. Ray,H. G. Ritter,Jay Roberts,O. V. Rogachevskiy,J. L. Romero,Amit Roy,L. Ruan,J. Rusnak,O. Rusnakova,N. R. Sahoo,P. K. Sahu,I. Sakrejda,Sevil Salur,J. Sandweiss,A. Sarkar,J. Schambach,R. P. Scharenberg,Alexander Schmah,W. B. Schmidke,N. Schmitz,Janet Elizabeth Seger,P. Seyboth,N. Shah,E. Shahaliev,P. V. Shanmuganathan,M. Shao,Monika Sharma,B. Sharma,W. Q. Shen,Z. Shi,S. S. Shi,Q. Y. Shou,E. P. Sichtermann,Rafal Sikora,Miroslav Simko,Subhash Singha,M. J. Skoby,D. Smirnov,Nikolai Smirnov,William Solyst,L. Song,P. Sorensen,H. M. Spinka,B. K. Srivastava,T. D. S. Stanislaus,M. Stepanov,R. Stock,M. N. Strikhanov,B.C. Stringfellow,M Šumbera,Branden Summa,Y. J. Sun,Z. Y. Sun,X. M. Sun,Bernd Surrow,D.N. Svirida,A. H. Tang,Zebo Tang,T. Tarnowsky,Abdel Nasser Tawfik,J. Thäder,J. H. Thomas,A. R. Timmins,D. Tlusty,Takahito Todoroki,M. Tokarev,S. Trentalange,R. E. Tribble,Prithwish Tribedy,S. K. Tripathy,O. D. Tsai,T. Ullrich,D. G. Underwood,Isaac Upsal,G. Van Buren,G. van Nieuwenhuizen,M. Vandenbroucke,Raghava Varma,A. N. Vasiliev,Róbert Vértesi,F. Videbaek,S. Vokal,S. A. Voloshin,A. Vossen,J. S. Wang,Y. Wang,Fuqiang Wang,H. Wang,G. Wang,J. C. Webb,G. Webb,L. Wen,G. D. Westfall,H. H. Wieman,S. W. Wissink,R. Witt,Y. Wu,Zhigang Xiao,Xiaoyi Xie,W. Xie,K. Xin,N. Xu,Y. Xu,Z. J. Xu,Qingnian Xu,Jun Xu,H.S. Xu,Q. Yang,Yi-feng Yang,Shangfeng Yang,C. Yang,Z. Ye,P. Yepes,L. Yi,K. Yip,I. K. Yoo,N. Yu,Hanna Paulina Zbroszczyk,W. Zha,S H Zhang,Z. Zhang,Jingqing Zhang,Y. Zhang,Junjie Zhang,Xing Zhang,J. Zhao,C. Zhong,Lei Zhou,X.L. Zhu,Y. Zoulkarneeva,Maksym Zyzak

Measurement of the Transverse Single-Spin Asymmetry in p↑+p→W±/Z0 at RHIC

2016

Author(s): Adamczyk, L; Adkins, JK; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alekseev, I; Aparin, A; Arkhipkin, D; Aschenauer, EC; Attri, A; Averichev, GS; Bai, X; Bairathi, V; Banerjee, A; Bellwied, R; Bhasin, A; Bhati, AK; Bhattarai, P; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Bouchet, J; Brandenburg, JD; Brandin, AV; Bunzarov, I; Butterworth, J; Caines, H; Calderon De La Barca Sanchez, M; Campbell, JM; Cebra, D; Chakaberia, I; Chaloupka, P; Chang, Z; Chattopadhyay, S; Chen, X; Chen, JH; Cheng, J; Cherney, M; Christie, W; Contin, G; Crawford, HJ; Das, S; De Silva, LC; Debbe, RR; Dedovich, TG; Deng, J; Derevschikov, AA; Di Ruzza, B; Didenko, L; Dilks, C; Dong, X; Drachenberg, JL; Draper, JE; Du, CM; Dunkelberger, LE; Dunlop, JC; Efimov, LG; Engelage, J; Eppley, G; Esha, R; Evdokimov, O; Eyser, O; Fatemi, R; Fazio, S; Federic, P; Fedorisin, J; Feng, Z; Filip, P; Fisyak, Y; Flores, CE; Fulek, L; Gagliardi, CA; Garand, D; Geurts, F; Gibson, A; Girard, M; Greiner, L; Grosnick, D; Gunarathne, DS; Guo, Y; Gupta, A; Gupta, S; Guryn, W; Hamad, A | Abstract: © 2016 American Physical Society. We present the measurement of the transverse single-spin asymmetry of weak boson production in transversely polarized proton-proton collisions at s=500 GeV by the STAR experiment at RHIC. The measured observable is sensitive to the Sivers function, one of the transverse-momentum-dependent parton distribution functions, which is predicted to have the opposite sign in proton-proton collisions from that observed in deep inelastic lepton-proton scattering. These data provide the first experimental investigation of the nonuniversality of the Sivers function, fundamental to our understanding of QCD.

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