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http://repositorio.unicamp.br/jspui/handle/REPOSIP/53420
Type: | Artigo de periódico |
Title: | Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W-+/- Boson Production in Polarized Proton-Proton Collisions at root s=500 GeV |
Author: | Aggarwal, MM Ahammed, Z Alakhverdyants, AV Alekseev, I Alford, J Anderson, BD Anson, CD Arkhipkin, D Averichev, GS Balewski, J Beavis, DR Bellwied, R Betancourt, MJ Betts, RR Bhasin, A Bhati, AK Bichsel, H Bielcik, J Bielcikova, J Biritz, B Bland, LC Borowski, W Bouchet, J Braidot, E Brandin, AV Bridgeman, A Brovko, SG Bruna, E Bueltmann, S Bunzarov, I Burton, TP Cai, XZ Caines, H Sanchez, MCD Cebra, D Cendejas, R Cervantes, MC Chajecki, Z Chaloupka, P Chattopadhyay, S Chen, HF Chen, JH Chen, JY Cheng, J Cherney, M Chikanian, A Choi, KE Christie, W Chung, P Codrington, MJM Corliss, R Cramer, JG Crawford, HJ Dash, S Leyva, AD De Silva, LC Debbe, RR Dedovich, TG Derevschikov, AA de Souza, RD Didenko, L Djawotho, P Dogra, SM Dong, X Drachenberg, JL Draper, JE Dunlop, JC Mazumdar, MRD Efimov, LG Elnimr, M Engelage, J Eppley, G Erazmus, B Estienne, M Eun, L Evdokimov, O Fatemi, R Fedorisin, J Fersch, RG Finch, E Fine, V Fisyak, Y Gagliardi, CA Gangadharan, DR Ganti, MS Geromitsos, A Geurts, F Ghosh, P Gorbunov, YN Gordon, A Grebenyuk, O Grosnick, D Guertin, SM Gupta, A Guryn, W Haag, B Hamed, A Han, LX Harris, JW Hays-Wehle, JP Heinz, M Heppelmann, S Hirsch, A Hjort, E Hoffmann, GW Hofman, DJ Huang, B Huang, HZ Humanic, TJ Huo, L Igo, G Jacobs, P Jacobs, WW Jena, C Jin, F Joseph, J Judd, EG Kabana, S Kang, K Kapitan, J Kauder, K Keane, D Kechechyan, A Kettler, D Kikola, DP Kiryluk, J Kisiel, A Kizka, V Klein, SR Knospe, AG Kocoloski, A Koetke, DD Kollegger, T Konzer, J Koralt, I Koroleva, L Korsch, W Kotchenda, L Kouchpil, V Kravtsov, P Krueger, K Krus, M Kumar, L Kurnadi, P Lamont, MAC Landgraf, JM LaPointe, S Lauret, J Lebedev, A Lednicky, R Lee, CH Lee, JH Leight, W LeVine, MJ Li, C Li, L Li, N Li, W Li, X Li, X Li, Y Li, ZM Lisa, MA Liu, F Liu, H Liu, J Ljubicic, T Llope, WJ Longacre, RS Love, WA Lu, Y Lukashov, EV Luo, X Ma, GL Ma, YG Mahapatra, DP Majka, R Mall, OI Mangotra, LK Manweiler, R Margetis, S Markert, C Masui, H Matis, HS Matulenko, YA McDonald, D McShane, TS Meschanin, A Milner, R Minaev, NG Mioduszewski, S Mischke, A Mitrovski, MK Mohanty, B Mondal, MM Morozov, B Morozov, DA Munhoz, MG Naglis, M Nandi, BK Nayak, TK Netrakanti, PK Ng, MJ Nogach, LV Nurushev, SB Odyniec, G Ogawa, A Ohlson, A Okorokov, V Oldag, EW Olson, D Pachr, M Page, BS Pal, SK Pandit, Y Panebratsev, Y Pawlak, T Peitzmann, T Perkins, C Peryt, W Phatak, SC Pile, P Planinic, M Ploskon, MA Pluta, J Plyku, D Poljak, N Poskanzer, AM Potukuchi, BVKS Powell, CB Prindle, D Pruneau, C Pruthi, NK Pujahari, PR Putschke, J Qiu, H Raniwala, R Raniwala, S Ray, RL Redwine, R Reed, R Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Ruan, L Sakai, S Sakrejda, I Sakuma, T Salur, S Sandweiss, J Sangaline, E Schambach, J Scharenberg, RP Schmah, AM Schmitz, N Schuster, TR Seele, J Seger, J Selyuzhenkov, I Seyboth, P Shahaliev, E Shao, M Sharma, M Shi, SS Sichtermann, EP Simon, F Singaraju, RN Skoby, MJ Smirnov, N Sorensen, P Spinka, HM Srivastava, B Stanislaus, TDS Staszak, D Stevens, JR Stock, R Strikhanov, M Stringfellow, B Suaide, AAP Suarez, MC Subba, NL Sumbera, M Sun, XM Sun, Y Sun, Z Surrow, B Svirida, DN Symons, TJM de Toledo, AS Takahashi, J Tang, AH Tang, Z Tarini, LH Tarnowsky, T Thein, D Thomas, JH Tian, J Timmins, AR Timoshenko, S Tlusty, D Tokarev, M Trainor, TA Tram, VN Trentalange, S Tribble, RE Tsai, OD Ullrich, T Underwood, DG Van Buren, G van Leeuwen, M van Nieuwenhuizen, G Vanfossen, JA Varma, R Vasconcelos, GMS Vasiliev, AN Videbk, F Viyogi, YP Vokal, S Voloshin, SA Wada, M Walker, M Wang, F Wang, G Wang, H Wang, JS Wang, Q Wang, XL Wang, Y Webb, G Webb, JC Westfall, GD Whitten, C Wieman, H Wissink, SW Witt, R Wu, YF Xie, W Xu, H Xu, N Xu, QH Xu, W Xu, Y Xu, Z Xue, L Yang, Y Yepes, P Yip, K Yoo, IK Yue, Q Zawisza, M Zbroszczyk, H Zhan, W Zhang, JB Zhang, S Zhang, WM Zhang, XP Zhang, Y Zhang, ZP Zhao, J Zhong, C Zhou, W Zhu, X Zhu, YH Zoulkarneev, R Zoulkarneeva, Y |
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 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. |
Country: | EUA |
Editor: | Amer Physical Soc |
Citation: | Physical Review Letters. Amer Physical Soc, v. 106, n. 6, 2011. |
Rights: | aberto |
Identifier DOI: | 10.1103/PhysRevLett.106.062002 |
Date Issue: | 2011 |
Appears in Collections: | Unicamp - Artigos e Outros Documentos |
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