J/ψ suppression at forward rapidity in Au + Au collisions at √sNN=39 and 62.4 GeV
We present measurements of the J/ψ invariant yields in √s NN=39 and 62.4 GeV Au + Au collisions at forward rapidity (1.2<|y|<2.2). Invariant yields are presented as a function of both collision centrality and transverse momentum. Nuclear modifications are obtained for central relative to peripheral Au + Au collisions (RCP) and for various centrality selections in Au + Au relative to scaled p + p cross sections obtained from other measurements (RAA). The observed suppression patterns at 39 and 62.4 GeV are quite similar to those previously measured at 200 GeV. This similar suppression presents a challenge to theoretical models that contain various competing mechanisms with different energy dependencies, some of which cause suppression and others enhancement. © 2012 American Physical Society.
Adare, A; Aidala, C; Ajitanand, NN; Akiba, Y; Akimoto, R; Al-Ta'Ani, H; Alexander, J; Angerami, A; Aoki, K; Apadula, N; Aramaki, Y; Asano, H; Aschenauer, EC; Atomssa, ET; Awes, TC; Azmoun, B; Babintsev, V; Bai, M; Bannier, B; Barish, KN; Bassalleck, B; Bathe, S; Baublis, V; Baumgart, S; Bazilevsky, A; Belmont, R; Berdnikov, A; Berdnikov, Y; Bing, X; Blau, DS; Boyle, K; Brooks, ML; Buesching, H; Bumazhnov, V; Butsyk, S; Campbell, S; Castera, P; Chen, CH; Chi, CY; Chiu, M; Choi, IJ; Choi, JB; Choi, S; Choudhury, RK; Christiansen, P; Chujo, T; Chvala, O; Cianciolo, V; Citron, Z; Cole, BA; Connors, M; Csanád, M; Csörgo, T; Dairaku, S; Datta, A; Daugherity, MS; David, G; Denisov, A; Deshpande, A; Desmond, EJ; Dharmawardane, KV; Dietzsch, O; Ding, L; Dion, A; Donadelli, M; Drapier, O; Drees, A; Drees, KA; Durham, JM; Durum, A; D'Orazio, L; Edwards, S; Efremenko, YV; Engelmore, T; Enokizono, A; Esumi, S; Eyser, KO; Fadem, B; Fields, DE; Finger, M; Fleuret, F; Fokin, SL; Frantz, JE; Franz, A; Frawley, AD; Fukao, Y; Fusayasu, T; Gainey, K; Gal, C; Garishvili, A; Garishvili, I; Glenn, A; Gong, X; Gonin, M; Goto, Y; Granier De Cassagnac, R; Grau, N; Greene, SV; Grosse Perdekamp, M
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