Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at √s=200GeV
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 Σ and A TT for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of √s=200GeV. The data represent integrated luminosities of 7.6pb -1 with longitudinal polarization and 1.8pb -1 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 Σ, 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. © 2012 American Physical Society.
Adamczyk, L; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alakhverdyants, AV; Alekseev, I; Alford, J; Anderson, BD; Anson, CD; Arkhipkin, D; Aschenauer, E; Averichev, GS; Balewski, J; Banerjee, A; Barnovska, Z; Beavis, DR; Bellwied, R; Betancourt, MJ; Betts, RR; Bhasin, A; Bhati, AK; Bichsel, H; Bielcik, J; Bielcikova, J; Bland, LC; Bordyuzhin, IG; Borowski, W; Bouchet, J; Brandin, AV; Bridgeman, A; Brovko, SG; Bruna, E; Bueltmann, S; Bunzarov, I; Burton, TP; Butterworth, J; Cai, XZ; Caines, H; Calderón De La Barca Sánchez, M; Cebra, D; Cendejas, R; Cervantes, MC; Chaloupka, P; Chattopadhyay, S; Chen, HF; Chen, JH; Chen, JY; Chen, L; Cheng, J; Cherney, M; Chikanian, A; Christie, W; Chung, P; Chwastowski, J; Codrington, MJM; Corliss, R; Cramer, JG; Crawford, HJ; Cui, X; Davila Leyva, A; De Silva, LC; Debbe, RR; Dedovich, TG; Deng, J; Derradi De Souza, R; Dhamija, S; Didenko, L; Ding, F; Dion, A; Djawotho, P; Dong, X; Drachenberg, JL; Draper, JE; Du, CM; Dunkelberger, LE; Dunlop, JC; Efimov, LG; Elnimr, M; Engelage, J; Eppley, G; Eun, L; Evdokimov, O; Fatemi, R; Fazio, S; Fedorisin, J; Fersch, RG; Filip, P; Finch, E; Fisyak, Y; Gagliardi, CA; Gangadharan, DR; Geurts, F; Gliske, S; Gorbunov, YN; Grebenyuk, OG; Grosnick, D; Gupta, S; Guryn, W; Haag, B; Hajkova, O
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