Measurement of the parity-violating longitudinal single-spin asymmetry for $W^{\pm}$ boson production in polarized proton-proton collisions at $\sqrt{s} = 500 $GeV

Autor: Aggarwal, M.M., Ahammed, Z., Alakhverdyants, A.V., Alekseev, I., Alford, J., Anderson, B.D., Anson, C.D., Arkhipkin, D., Averichev, G.S., Balewski, J., Beavis, D.R., Bellwied, R., Betancourt, M.J., Betts, R.R., Bhasin, A., K. Bhati, A., Bichsel, H., Bielcik, J., Bielcikova, J., Biritz, B., C. Bland, L., Borowski, W., Bouchet, J., Braidot, E., V. Brandin, A., Bridgeman, A., G. Brovko, S., Bruna, E., Bueltmann, S., Bunzarov, I., P. Burton, T., Z. Cai, X., Caines, H., Calder On De La Barca S Anchez, M., Cebra, D., Cendejas, R., C. Cervantes, M., Chajecki, Z., Chaloupka, P., Chattopadhyay, S., F. Chen, H., H. Chen, J., Y. Chen, J., Cheng, J., Cherney, M., Chikanian, A., E. Choi, K., Christie, W., Chung, P., J. M. Codrington, M., Corliss, R., G. Cramer, J., J. Crawford, H., Dash, S., Davila Leyva, A., C. De Silva, L., Debbe, R.R., G. Dedovich, T., A. Derevschikov, A., Derradi De Souza, R., Didenko, L., Djawotho, P., M. Dogra, S., Dong, X., L. Drachenberg, J., E. Draper, J., C. Dunlop, J., R. Dutta Mazumdar, M., G. E., L., Elnimr, M., Engelage, J., Eppley, G., Erazmus, B., Estienne, Magali, Eun, L., Evdokimov, O., Fatemi, R., Fedorisin, J., G. Fersch, R., Finch, E., Fine, V., Fisyak, Y., Gagliardi, C.A., R. Gangadharan, D., S. Ganti, M., Geromitsos, A., Geurts, F., Ghosh, P., N. Gorbunov, Y., Gordon, A., Grebenyuk, O., Grosnick, D., M. Guertin, S., Gupta, Anupam, Guryn, W., Haag, B., Hamed, A., Han, L.-X., W. Harris, J., P. Hays-Wehle, J., Heinz, M., Heppelmann, S., Hirsch, A., Hjort, E., W. Ho, G., J. Hofman, D., Huang, B., Z. Huang, H., J. Humanic, T., Huo, L., Igo, G., Jacobs, P., Jacobs, W.W., Jena, C., Jin, F., Joseph, J., G. Judd, E., Kabana, S., Kang, K., Kapitan, J., Kauder, K., Keane, D., Kechechyan, A., Kettler, D., P. Kikola, D., Kiryluk, J., Kisiel, A., Kizka, V., R. Klein, S., G. Knospe, A., Kocoloski, A., D. Koetke, D., 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, M.A. C., M. Landgraf, J., Lapointe, S., Lauret, J., Lebedev, A., Lednicky, R., Lee, C.-H., H. Lee, J., Leight, W., J. Levine, M., Li, C., Li, L., Li, N., Li, W., Li, Xiaojian, Li, Y., M. Li, Z., A. Lisa, M., Liu, Franklin, Liu, Hong, Liu, J., Ljubicic, T., J. Llope, W., S. Longacre, R., Love, W.A., Lu, Y., V. Lukashov, E., Luo, X., L. Ma, G., G. Ma, Y., P. Mahapatra, D., Majka, R., I. Mall, O., K. Mangotra, L., Manweiler, R., Margetis, S., Markert, C., Masui, H., S. Matis, H., A. Matulenko, Yu., Mcdonald, D., S. Mcshane, T., Meschanin, A., Milner, R., G. Minaev, N., Mioduszewski, S., Mischke, A., K. Mitrovski, M., Mohanty, B., M. Mondal, M., Morozov, B., Morozov, D.A., G. Munhoz, M., Naglis, M., K. Nandi, B., K. Nayak, T., K. Netrakanti, P., J. Ng, M., V. Nogach, L., B. Nurushev, S., Odyniec, G., Ogawa, A., Okorokov, V., W. Oldag, E., Olson, D., Pachr, M., S. Page, B., K. Pal, S., Pandit, Y., Panebratsev, Y., Pawlak, T., Peitzmann, T., Perkins, C., Peryt, W., C. Phatak, S., Pile, P., Planinic, M., A. Ploskon, M., Pluta, J., Plyku, D., Poljak, N., M. Poskanzer, A., V. K. S. Potukuchi, B., B. Powell, C., Prindle, D., Pruneau, C., K. Pruthi, N., R. Pujahari, P., Putschke, J., Qiu, H., Raniwala, R., Raniwala, S., L. Ray, R., Redwine, R., Reed, R., G. Ritter, H., B. Roberts, J., V. Rogachevskiy, O., L. Romero, J., Rose, A., Ruan, L., Sakai, S., Sakrejda, I., Sakuma, T., Salur, S., Sandweiss, J., Sangaline, E., Schambach, J., P. Scharenberg, R., M. Schmah, A., Schmitz, N., R. Schuster, T., Seele, J., Seger, J., Selyuzhenkov, I., Seyboth, P., Shahaliev, E., Shao, M., Sharma, M., Shi, S.S., P. Sichtermann, E., Simon, F., N. Singaraju, R., J. Skoby, M., Smirnov, N., Sorensen, P., M. Spinka, H., Srivastava, B., D. S. Stanislaus, T., Staszak, D., R. Stevens, J., Stock, R., Strikhanov, M., Stringfellow, B., A. P. Suaide, A., C. Suarez, M., L. Subba, N., Sumbera, M., M. Sun, X., Sun, Y., Sun, Z., Surrow, B., N. Svirida, D., J. M. Symons, T., Szanto De Toledo, A., Takahashi, J., H. Tang, A., Tang, Z., H. Tarini, L., Tarnowsky, T., Thein, D., H. Thomas, J., Tian, J., R. Timmins, A., Timoshenko, S., Tlusty, D., Tokarev, M., Trainor, T.A., N. Tram, V., Trentalange, S., E. Tribble, R., D. Tsai, O., Ullrich, T., G. Underwood, D., Van Buren, G., Van Leeuwen, M., Van Nieuwenhuizen, G., A. Vanfossen, J., Varma, R., M. S. Vasconcelos, G., N. Vasiliev, A., Videb K, F., P. Viyogi, Y., Vokal, S., Voloshin, S.A., Wada, M., Walker, M., Wang, F., Wang, Gang, Wang, H., S. Wang, J., Wang, Q., L. Wang, X., Wang, Y., Webb, G., C. Webb, J., D. Westfall, G., Whitten Jr., C., Wieman, H., W. Wissink, S., Witt, R., F. Wu, Y., Xie, W., Xu, H., Xu, N., H. Xu, Q., Xu, Wei-Jiang, Xu, Y., Xu, Z., Xue, L., Yang, Y., Yepes, P., Yip, K., Yoo, I.-K., Yue, Q., Zawisza, M., Zbroszczyk, H., Zhan, W., B. Zhang, J., Zhang, S., M. Zhang, W., P. Zhang, X., Zhang, Y., [hep-Ex] Sep, Arxiv:.V, P. Zhang, Z., Zhao, J., Zhong, C., Zhou, W., Zhu, X., H. Zhu, Y., Zoulkarneev, R., Zoulkarneeva, Y.
Přispěvatelé: Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), STAR
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: Physical Review Letters
Physical Review Letters, American Physical Society, 2011, 106, pp.062002. ⟨10.1103/PhysRevLett.106.062002⟩
ISSN: 0031-9007
1079-7114
Popis: 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 $\sqrt{s}=500 $GeV by the STAR experiment at RHIC. The measured asymmetries, $A^{W^+}_{L}=-0.27\pm 0.10\;({\rm stat.})\pm 0.02\;({\rm syst.}) \pm 0.03\;({\rm norm.})$ and $A^{W^-}_{L}=0.14\pm 0.19\;({\rm stat.})\pm 0.02 \;({\rm syst.})\pm 0.01\;({\rm norm.})$, 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 DIS measurements.
6 pages, 4 figures, submitted to Physics Review Letters
Databáze: OpenAIRE