Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at sqrt{s}=200 GeV

Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at sqrt{s}=200 GeV

We report STAR measurements of the longitudinal double-spin asymmetry A_LL, the transverse single-spin asymmetry A_N, and the transverse double-spin asymmetries A_Sigma and A_TT for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of sqrt{s} = 200 GeV....

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Veröffentlicht in:arXiv.org 2012-05
Hauptverfasser: The STAR Collaboration, Adamczyk, L, Arkhipkin, D, Banerjee, A, Bellwied, R, Betancourt, M J, Betts, R R, Bielcikova, J, Bouchet, J, Burton, T P, Cai, X Z, Cervantes, M C, Chen, H F, Chen, J Y, Christie, W, Chung, P, Chwastowski, J, Cramer, J G, Cui, X, Deng, J, Didenko, L, Djawotho, P, Drachenberg, J L, Engelage, J, Evdokimov, O, Fedorisin, J, Fersch, R G, Geurts, F, Gliske, S, Grebenyuk, O G, Hamed, A, Harris, J W, Heppelmann, S, Igo, G, Jacobs, W W, Kauder, K, Ke, H W, Keane, D, Kechechyan, A, Kikola, D P, Kiryluk, J, Kizka, V, Kotchenda, L, Krueger, K, Kumar, L, LaPointe, S, Lebedev, A, LeVine, M J, W Li, Luo, X, Majka, R, McDonald, D, Mondal, M M, Morozov, B, Mustafa, M K, Nasim, Md, Ohlson, A, Okorokov, V, Oliveira, R A N, Pachr, M, Page, B S, Panebratsev, Y, Pei, H, Pile, P, Prindle, D, Przybycien, M, Pujahari, P R, Putschke, J, Riley, C K, Rogachevskiy, O V, Ross, J F, Sandacz, A, Sarkar, A, Sarsour, M, Schambach, J, Schmah, A M, Schuster, T R, Seger, J, Shahaliev, E, Sharma, M, Shi, S S, Smirnov, D, Smirnov, N, deSouza, U G, Spinka, H M, Staszak, D, Stevens, J R, Stock, R, Stringfellow, B, Tarini, L H, Tlusty, D, Ullrich, T, Vokal, S, Vossen, A, Wieman, H, Wu, Y F, H Xu, Yepes, P, Zbroszczyk, H, Zhang, Y
Format: Artikel
Sprache:eng
Schlagworte:
Asymmetry
Beams (radiation)
Collisions
Polarization
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Zusammenfassung:We report STAR measurements of the longitudinal double-spin asymmetry A_LL, the transverse single-spin asymmetry A_N, and the transverse double-spin asymmetries A_Sigma and A_TT for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of sqrt{s} = 200 GeV. The data represent integrated luminosities of 7.6 /pb with longitudinal polarization and 1.8 /pb with transverse polarization, with 50-55% beam polarization, and were recorded in 2005 and 2006. No evidence is found for the existence of statistically significant jet A_N, A_Sigma, or A_TT at mid-rapidity. Recent model calculations indicate the A_N results may provide new limits on the gluon Sivers distribution in the proton. The asymmetry A_LL significantly improves the knowledge of gluon polarization in the nucleon.
ISSN:2331-8422