학술논문

Measurement of longitudinal spin asymmetries for weak boson production in polarized proton-proton collisions at RHIC
Document Type
Working Paper
Author
STAR CollaborationAdamczyk, L.Adkins, J. K.Agakishiev, G.Aggarwal, M. M.Ahammed, Z.Alekseev, I.Alford, J.Anson, C. D.Aparin, A.Arkhipkin, D.Aschenauer, E. C.Averichev, G. S.Balewski, J.Banerjee, A.Beavis, D. R.Bellwied, R.Bhasin, A.Bhati, A. K.Bhattarai, P.Bichsel, H.Bielcik, J.Bielcikova, J.Bland, L. C.Bordyuzhin, I. G.Borowski, W.Bouchet, J.Brandin, A. V.Brovko, S. G.Bültmann, S.Bunzarov, I.Burton, T. P.Butterworth, J.Caines, H.Sánchez, M. Calderón de la BarcaCampbell, J. M.Cebra, D.Cendejas, R.Cervantes, M. C.Chaloupka, P.Chang, Z.Chattopadhyay, S.Chen, H. F.Chen, J. H.Chen, L.Cheng, J.Cherney, M.Chikanian, A.Christie, W.Chwastowski, J.Codrington, M. J. M.Contin, G.Cramer, J. G.Crawford, H. J.Cui, X.Das, S.Leyva, A. DavilaDe Silva, L. C.Debbe, R. R.Dedovich, T. G.Deng, J.Derevschikov, A. A.de Souza, R. DerradiDhamija, S.di Ruzza, B.Didenko, L.Dilks, C.Ding, F.Djawotho, P.Dong, X.Drachenberg, J. L.Draper, J. E.Du, C. M.Dunkelberger, L. E.Dunlop, J. C.Efimov, L. G.Engelage, J.Engle, K. S.Eppley, G.Eun, L.Evdokimov, O.Eyser, O.Fatemi, R.Fazio, S.Fedorisin, J.Filip, P.Finch, E.Fisyak, Y.Flores, C. E.Gagliardi, C. A.Gangadharan, D. R.Garand, D.Geurts, F.Gibson, A.Girard, M.Gliske, S.Greiner, L.Grosnick, D.Gunarathne, D. S.Guo, Y.Gupta, A.Gupta, S.Guryn, W.Haag, B.Hamed, A.Han, L-X.Haque, R.Harris, J. W.Heppelmann, S.Hirsch, A.Hoffmann, G. W.Hofman, D. J.Horvat, S.Huang, B.Huang, H. Z.Huang, X.Huck, P.Humanic, T. J.Igo, G.Jacobs, W. W.Jang, H.Judd, E. G.Kabana, S.Kalinkin, D.Kang, K.Kauder, K.Ke, H. W.Keane, D.Kechechyan, A.Kesich, A.Khan, Z. H.Kikola, D. P.Kisel, I.Kisiel, A.Koetke, D. D.Kollegger, T.Konzer, J.Koralt, I.Kosarzewski, L. K.Kotchenda, L.Kraishan, A. F.Kravtsov, P.Krueger, K.Kulakov, I.Kumar, L.Kycia, R. A.Lamont, M. A. C.Landgraf, J. M.Landry, K. D.Lauret, J.Lebedev, A.Lednicky, R.Lee, J. H.LeVine, M. J.Li, C.Li, W.Li, X.Li, Y.Li, Z. M.Lisa, M. A.Liu, F.Ljubicic, T.Llope, W. J.Lomnitz, M.Longacre, R. S.Luo, X.Ma, G. L.Ma, Y. G.Don, D. M. M. D. MadagodagettigeMahapatra, D. P.Majka, R.Margetis, S.Markert, C.Masui, H.Matis, H. S.McDonald, D.McShane, T. S.Minaev, N. G.Mioduszewski, S.Mohanty, B.Mondal, M. M.Morozov, D. A.Mustafa, M. K.Nandi, B. K.Nasim, Md.Nayak, T. K.Nelson, J. M.Nigmatkulov, G.Nogach, L. V.Noh, S. Y.Novak, J.Nurushev, S. B.Odyniec, G.Ogawa, A.Oh, K.Ohlson, A.Okorokov, V.Oldag, E. W.Olvitt Jr., D. L.Pachr, M.Page, B. S.Pal, S. K.Pan, Y. X.Pandit, Y.Panebratsev, Y.Pawlak, T.Pawlik, B.Pei, H.Perkins, C.Peryt, W.Pile, P.Planinic, M.Pluta, J.Poljak, N.Poniatowska, K.Porter, J.Poskanzer, A. M.Pruthi, N. K.Przybycien, M.Pujahari, P. R.Putschke, J.Qiu, H.Quintero, A.Ramachandran, S.Raniwala, R.Raniwala, S.Ray, R. L.Riley, C. K.Ritter, H. G.Roberts, J. B.Rogachevskiy, O. V.Romero, J. L.Ross, J. F.Roy, A.Ruan, L.Rusnak, J.Rusnakova, O.Sahoo, N. R.Sahu, P. K.Sakrejda, I.Salur, S.Sandweiss, J.Sangaline, E.Sarkar, A.Schambach, J.Scharenberg, R. P.Schmah, A. M.Schmidke, W. B.Schmitz, N.Seger, J.Seyboth, P.Shah, N.Shahaliev, E.Shanmuganathan, P. V.Shao, M.Sharma, B.Shen, W. Q.Shi, S. S.Shou, Q. Y.Sichtermann, E. P.Singaraju, R. N.Skoby, M. J.Smirnov, D.Smirnov, N.Solanki, D.Sorensen, P.Spinka, H. M.Srivastava, B.Stanislaus, T. D. S.Stevens, J. R.Stock, R.Strikhanov, M.Stringfellow, B.Sumbera, M.Sun, X.Sun, X. M.Sun, Y.Sun, Z.Surrow, B.Svirida, D. N.Symons, T. J. M.Szelezniak, M. A.Takahashi, J.Tang, A. H.Tang, Z.Tarnowsky, T.Thomas, J. H.Timmins, A. R.Tlusty, D.Tokarev, M.Trentalange, S.Tribble, R. E.Tribedy, P.Trzeciak, B. A.Tsai, O. D.Turnau, J.Ullrich, T.Underwood, D. G.Van Buren, G.van Nieuwenhuizen, G.Vandenbroucke, M.Vanfossen, Jr., J. A.Varma, R.Vasconcelos, G. M. S.Vasiliev, A. N.Vertesi, R.Videbæk, F.Viyogi, Y. P.Vokal, S.Vossen, A.Wada, M.Wang, F.Wang, G.Wang, H.Wang, J. S.Wang, X. L.Wang, Y.Webb, G.Webb, J. C.Westfall, G. D.Wieman, H.Wissink, S. W.Witt, R.Wu, Y. F.Xiao, Z.Xie, W.Xin, K.Xu, H.Xu, J.Xu, N.Xu, Q. H.Xu, Y.Xu, Z.Yan, W.Yang, C.Yang, Y.Ye, Z.Yepes, P.Yi, L.Yip, K.Yoo, I-K.Yu, N.Zawisza, Y.Zbroszczyk, H.Zha, W.Zhang, J. B.Zhang, J. L.Zhang, S.Zhang, X. P.Zhang, Y.Zhang, Z. P.Zhao, F.Zhao, J.Zhong, C.Zhu, X.Zhu, Y. H.Zoulkarneeva, Y.Zyzak, M.
Source
Phys. Rev. Lett. 113, 072301 (2014)
Subject
Nuclear Experiment
High Energy Physics - Experiment
Language
Abstract
We report measurements of single- and double- spin asymmetries for $W^{\pm}$ and $Z/\gamma^*$ boson production in longitudinally polarized $p+p$ collisions at $\sqrt{s} = 510$ GeV by the STAR experiment at RHIC. The asymmetries for $W^{\pm}$ were measured as a function of the decay lepton pseudorapidity, which provides a theoretically clean probe of the proton's polarized quark distributions at the scale of the $W$ mass. The results are compared to theoretical predictions, constrained by recent polarized deep inelastic scattering measurements, and show a preference for a sizable, positive up antiquark polarization in the range $0.05Comment: 7 pages, 5 figures, Submitted to Physical Review Letters; replaced with published version