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  • Adamczyk, L; Adkins, J K; Arkhipkin, D; Aschenauer, E C; Averichev, G S; Burton, T P; Cervantes, M C; Chen, H F; Christie, W; Cui, X; Das, S; A Davila Leyva; Derevschikov, A A; Draper, J E; Efimov, L G; Eppley, G; Fatemi, R; Filip, P; Finch, E; Gangadharan, D R; Gliske, S; Guryn, W; Haag, B; L-X Han; Hirsch, A; Huang, B; Humanic, T J; Kauder, K; Ke, H W; Keane, D; Kechechyan, A; Kikola, D P; Koetke, D D; Koralt, I; Kravtsov, P; Landgraf, J M; Lauret, J; Lisa, M A; Liu, F; Luo, X; Majka, R; Margetis, S; Markert, C; Masui, H; Matis, H S; McDonald, D; McShane, T S; Mohanty, B; Morozov, D A; Nayak, T K; Nelson, J M; Nigmatkulov, G; Odyniec, G; K Oh; Oldag, E W; Peryt, W; Poljak, N; Putschke, J; Qiu, H; Riley, C K; Rogachevskiy, O V; Rusnakova, O; Sakrejda, I; Schmitz, N; Shahaliev, E; Sharma, B; Shi, S S; Shou, Q Y; Sichtermann, E P; Solanki, D; Sorensen, P; Srivastava, B; Stanislaus, T D S; Strikhanov, M; Stringfellow, B; Sumbera, M; Tang, A H; Tarnowsky, T; Thomas, J H; Tlusty, D; Underwood, D G; G van Nieuwenhuizen; Vandenbroucke, M; Viyogi, Y P; Vokal, S; Wada, M; Wang, G; Wang, J S; Wang, Y; Westfall, G D; Witt, R; Wu, Y F; N Xu; Yan, W; I-K, Yoo; Zawisza, Y; Zhang, J B; Zhang, Y; Zoulkarneeva, Y; Zyzak, M

    arXiv.org, 04/2014
    Paper, Journal Article

    Rapidity-odd directed flow(\(v_1\)) measurements for charged pions, protons and antiprotons near mid-rapidity (\(y=0\)) are reported in \(\sqrt{s_{NN}} =\) 7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV Au + Au collisions as recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). At intermediate impact parameters, the proton and net-proton slope parameter \(dv_1/dy|_{y=0}\) shows a minimum between 11.5 and 19.6 GeV. In addition, the net-proton \(dv_1/dy|_{y=0}\) changes sign twice between 7.7 and 39 GeV. The proton and net-proton results qualitatively resemble predictions of a hydrodynamic model with a first-order phase transition from hadronic matter to deconfined matter, and differ from hadronic transport calculations.