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    Adamczyk, L; Agakishiev, G; Aggarwal, M M; Aschenauer, E C; Averichev, G S; Bellwied, R; Bhati, A K; Bielcik, J; Bouchet, J; Burton, T P; Butterworth, J; Calderón de la Barca Sánchez, M; Campbell, J M; Cebra, D; Cendejas, R; Cervantes, M C; Cherney, M; Christie, W; Contin, G; Das, S; Dedovich, T G; Deng, J; di Ruzza, B; Djawotho, P; Draper, J E; Dunkelberger, L E; Eppley, G; Fatemi, R; Fazio, S; Garand, D; Gliske, S; Greiner, L; Gunarathne, D S; Huang, B; Jacobs, W W; Kabana, S; Kosarzewski, L K; Kotchenda, L; Kraishan, A F; Kycia, R A; Landgraf, J M; Li, W; Li, X; Li, Z M; Lisa, M A; Longacre, R S; Madagodagettige Don, D M M D; Matis, H S; McDonald, D; Nandi, B K; Nayak, T K; Nelson, J M; Nogach, L V; Noh, S Y; Pawlik, B; Perkins, C; Pile, P; Poskanzer, A M; Raniwala, S; Ray, R L; Riley, C K; Rogachevskiy, O V; Rusnakova, O; Sahoo, N R; Sarkar, A; Schambach, J; Seger, J; Shao, M; Shou, Q Y; Smirnov, D; Stanislaus, T D S; Sumbera, M; Sun, X; Symons, T J M; Tang, Z; Thomas, J H; Timmins, A R; Tokarev, M; Trentalange, S; Trzeciak, B A; Underwood, D G; Van Buren, G; van Nieuwenhuizen, G; Vandenbroucke, M; Vertesi, R; Vokal, S; Wang, X L; Wang, Y; Webb, G; Webb, J C; Xin, K; Yang, Y; Ye, Z; Yepes, P; Yip, K; Zbroszczyk, H; Zhang, J B; Zhang, S; Zhao, F; Zhu, X

    Physical review letters, 2015-Aug-28, Letnik: 115, Številka: 9
    Journal Article

    We report a new measurement of the midrapidity inclusive jet longitudinal double-spin asymmetry, A_{LL}, in polarized pp collisions at center-of-mass energy sqrts=200  GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep-inelastic scattering (DIS), semi-inclusive DIS, and RHIC pp data. The measured asymmetries provide evidence at the 3σ level for positive gluon polarization in the Bjorken-x region x>0.05.