J/psi suppression at forward rapidity in Au+Au collisions at sqrt(s_NN)=39 and 62.4 GeV (CROSBI ID 189761)
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Podaci o odgovornosti
Adare, A. ; ... ; Makek, Mihael ; ... ; Zelenski, A. ; and PHENIX Collaboration
engleski
J/psi suppression at forward rapidity in Au+Au collisions at sqrt(s_NN)=39 and 62.4 GeV
We present measurements of the J/psi invariant yields in sqrt(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 (R_CP) and for various centrality selections in Au+Au relative to scaled p+p cross sections obtained from other measurements (R_AA). 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.
J/psi(3100): suppression; rapidity dependence; transverse momentum: dependence; PHENIX; heavy ion: scattering; impact parameter: dependence; Brookhaven RHIC Coll; 39.0: 62.4 GeV-cms/nucleon
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Podaci o izdanju
86 (6)
2012.
64901-1-64901-10
objavljeno
0556-2813
10.1103/PhysRevC.86.064901