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Measurement of the parity-violating longitudinal single-spin asymmetry for W± boson production in polarized proton-proton collisions at √s=500GeV

  • 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. Calderón DeLaBarca Sánchez, 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, 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. Videbæk, 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
  • Panjab University
  • Lawrence Berkeley National Laboratory
  • Joint Institute for Nuclear Research
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Kent State University
  • Ohio State University
  • Brookhaven National Laboratory
  • Massachusetts Institute of Technology
  • Wayne State University
  • University of Illinois at Chicago
  • University of Jammu
  • University of Washington
  • Czech Technical University in Prague
  • Czech Academy of Sciences
  • University of California at Los Angeles
  • SUBATECH
  • Utrecht University
  • Moscow Engineering Physics Institute
  • Argonne National Laboratory
  • University of California at Davis
  • Yale University
  • Old Dominion University
  • Chinese Academy of Sciences
  • Texas A&M University
  • Variable Energy Cyclotron Centre India
  • University of Science and Technology of China
  • Central China Normal University
  • Tsinghua University
  • Creighton University
  • Pusan National University
  • University of California at Berkeley
  • Institute of Physics Bhubaneswar
  • University of Texas at Austin
  • Institute for High Energy Physics
  • Universidade Estadual de Campinas
  • Rice University
  • Pennsylvania State University
  • University of Kentucky
  • Valparaiso University
  • Purdue University
  • Indiana University Bloomington
  • Warsaw University of Technology
  • Goethe University Frankfurt
  • Shandong University
  • Universidade de São Paulo
  • Indian Institute of Technology Bombay
  • University of Zagreb
  • CAS - Institute of Modern Physics
  • University of Rajasthan
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Michigan State University
  • United States Naval Academy

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

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 √s=500GeV by the STAR experiment at RHIC. The measured asymmetries, ALW+=-0.27±0.10(stat.)±0.02(syst.) ±0.03(norm.) and ALW-=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.

Original languageEnglish
Article number062002
JournalPhysical Review Letters
Volume106
Issue number6
DOIs
StatePublished - Feb 11 2011

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