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  • Observation of Transverse S...
    Adamczyk, L; Adkins, J K; Agakishiev, G; Aggarwal, M M; Arkhipkin, D; Aschenauer, E C; Bhasin, A; Bielcikova, J; Bland, L C; Bordyuzhin, I G; Bunzarov, I; Butterworth, J; Cebra, D; Cherney, M; Christie, W; Derevschikov, A A; Didenko, L; Drachenberg, J L; Du, C M; Efimov, L G; Engelage, J; Evdokimov, O; Eyser, O; Fazio, S; Filip, P; Gagliardi, C A; Gibson, A; Girard, M; Gunarathne, D S; Gupta, S; Hamad, A; Hamed, A; Haque, R; Heppelmann, S; Hirsch, A; Hofman, D J; Huang, H Z; Kabana, S; Kang, K; Ke, H W; Keane, D; Kechechyan, A; Kisiel, A; Koetke, D D; Landry, K D; Li, C; Li, X; Liu, F; Ljubicic, T; Majka, R; Manion, A; Margetis, S; Masui, H; McDonald, D; Minaev, N G; Mustafa, M K; Nandi, B K; Nayak, T K; Nogach, L V; Odyniec, G; Olvitt, D; Pawlik, B; Pei, H; Planinic, M; Putschke, J; Raniwala, S; Ray, R L; Roy, A; Sakrejda, I; Salur, S; Sandweiss, J; Seyboth, P; Shanmuganathan, P V; Sharma, B; Shou, Q Y; Sikora, R; Skoby, M J; Smirnov, N; Sorensen, P; Stanislaus, T D S; Stepanov, M; Sun, X; Svirida, N; Tribedy, P; Tripathy, S K; Tsai, O D; Upsal, I; van Nieuwenhuizen, G; Vertesi, R; Viyogi, Y P; Wang, Y; Wang, Y; Xie, W; Xin, K; Yang, Q; Yang, Y; Yu, N; Zhang, S; Zhu, X; Zyzak, M

    Physical review letters, 2015-Dec-11, Letnik: 115, Številka: 24
    Journal Article

    We report the observation of transverse polarization-dependent azimuthal correlations in charged pion pair production with the STAR experiment in p^{↑}+p collisions at RHIC. These correlations directly probe quark transversity distributions. We measure signals in excess of 5 standard deviations at high transverse momenta, at high pseudorapidities η>0.5, and for pair masses around the mass of the ρ meson. This is the first direct transversity measurement in p+p collisions.