UNI-MB - logo
UMNIK - logo
 
E-resources
Full text
Open access
  • Nuclear dependence of the transverse-single-spin asymmetry for forward neutron production in polarized $p$$+$$A\( collisions at \)\sqrt{s_{_{NN}}}=200$ GeV
    Akiba, Y; Alfred, M; Azmoun, B; Babintsev, V; Barish, K N; Bathe, S; Bazilevsky, A; Belmont, R; Bryslawskyj, J; Campbell, S; V Canoa Roman; Cervantes, R; Chiu, M; Connors, M; Cronin, N; Csanád, M; Denisov, A; Dixit, D; Dumancic, M; Elder, T; En'yo, H; Fadem, B; Feege, N; Jr; Frawley, A D; Fukuda, Y; Garg, P; Giordano, F; Grau, N; Haggerty, J S; Haseler, T O S; Hemmick, T K; Hill, J C; Huang, S; Ivanishchev, D; Jiang, X; Jouan, D; Kawall, D; Kim, D J; Kim, M H; Kincses, D; Kistenev, E; Klatsky, J; Kline, P; Kwon, Y; Liu, M X; V-R Loggins; Manko, V I; Mendoza, M; Metzger, W J; Mihalik, D E; Mitchell, J T; Mitsuka, G; Miyasaka, S; Morrow, S I M; Nagashima, T; Nagy, M I; Nouicer, R; O'Brien, E; Oskarsson, A; Pantuev, V; Park, S; Peng, W; Perera, G D N; Perry, J; Pinkenburg, C; Radzevich, P V; Riabov, Y; Rinn, T; Rolnick, S D; Safonov, A S; Schaefer, B; Shein, I; Shigaki, K; Silvermyr, D; Singh, V; Smith, K L; Snowball, M; Sondheim, W E; Sorensen, S P; Sourikova, I V; Sugitate, T; Sumita, T; Takeda, A; Tannenbaum, M J; Timilsina, A; Towell, R S; Vazquez-Carson, S; Velkovska, J; Vrba, V; Woody, C L; Yalcin, S; Yanovich, A; Yin, P; Yoon, I; H Yu; Yushmanov, I E; Zajc, W A; Zelenski, A; Zharko, S

    arXiv.org, 11/2017
    Paper

    During 2015 the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized $p$$+$$p\( collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in \)p$$+$$p\( collisions predicts only a moderate atomic-mass-number (\)A\() dependence. In contrast, the asymmetries observed at RHIC in \)p$$+$$A\( collisions showed a surprisingly strong \)A\( dependence in inclusive forward neutron production. The observed asymmetry in \)p$$+\(Al collisions is much smaller, while the asymmetry in \)p$$+\(Au collisions is a factor of three larger in absolute value and of opposite sign. The interplay of different neutron production mechanisms is discussed as a possible explanation of the observed \)A$ dependence.

Shelf entry