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Measurement of inclusive J/ψ suppression in Au+Au collisions at sNN=200 GeV through the dimuon channel at STAR

  • Author(s): Adam, J
  • Adamczyk, L
  • Adams, JR
  • Adkins, JK
  • Agakishiev, G
  • Aggarwal, MM
  • Ahammed, Z
  • Alekseev, I
  • Anderson, DM
  • Aoyama, R
  • Aparin, A
  • Arkhipkin, D
  • Aschenauer, EC
  • Ashraf, MU
  • Atetalla, F
  • Attri, A
  • Averichev, GS
  • Bairathi, V
  • Barish, K
  • Bassill, AJ
  • Behera, A
  • Bellwied, R
  • Bhasin, A
  • Bhati, AK
  • Bielcik, J
  • Bielcikova, J
  • Bland, LC
  • Bordyuzhin, IG
  • Brandenburg, JD
  • Brandin, AV
  • Bryslawskyj, J
  • Bunzarov, I
  • Butterworth, J
  • Caines, H
  • Calderón de la Barca Sánchez, M
  • Cebra, D
  • Chakaberia, I
  • Chaloupka, P
  • Chan, BK
  • Chang, FH
  • Chang, Z
  • Chankova-Bunzarova, N
  • Chatterjee, A
  • Chattopadhyay, S
  • Chen, JH
  • Chen, X
  • Cheng, J
  • Cherney, M
  • Christie, W
  • Crawford, HJ
  • Csanád, M
  • Das, S
  • Dedovich, TG
  • Deppner, IM
  • Derevschikov, AA
  • Didenko, L
  • Dilks, C
  • Dong, X
  • Drachenberg, JL
  • Dunlop, JC
  • Edmonds, T
  • Elsey, N
  • Engelage, J
  • Eppley, G
  • Esha, R
  • Esumi, S
  • Evdokimov, O
  • Ewigleben, J
  • Eyser, O
  • Fatemi, R
  • Fazio, S
  • Federic, P
  • Fedorisin, J
  • Feng, Y
  • Filip, P
  • Finch, E
  • Fisyak, Y
  • Fulek, L
  • Gagliardi, CA
  • Galatyuk, T
  • Geurts, F
  • Gibson, A
  • Gopal, K
  • Grosnick, D
  • Gupta, A
  • Guryn, W
  • Hamad, AI
  • Hamed, A
  • Harris, JW
  • He, L
  • Heppelmann, S
  • Herrmann, N
  • Holub, L
  • Hong, Y
  • Horvat, S
  • Huang, B
  • Huang, HZ
  • Huang, SL
  • Huang, T
  • Huang, X
  • et al.
Abstract

J/ψ suppression has long been considered a sensitive signature of the formation of the Quark-Gluon Plasma (QGP) in relativistic heavy-ion collisions. In this letter, we present the first measurement of inclusive J/ψ production at mid-rapidity through the dimuon decay channel in Au+Au collisions at s =200 GeV with the STAR experiment. These measurements became possible after the installation of the Muon Telescope Detector was completed in 2014. The J/ψ yields are measured in a wide transverse momentum (p ) range of 0.15 GeV/c to 12 GeV/c from central to peripheral collisions. They extend the kinematic reach of previous measurements at RHIC with improved precision. In the 0-10% most central collisions, the J/ψ yield is suppressed by a factor of approximately 3 for p >5 GeV/c relative to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The J/ψ nuclear modification factor displays little dependence on p in all centrality bins. Model calculations can qualitatively describe the data, providing further evidence for the color-screening effect experienced by J/ψ mesons in the QGP. NN T T T

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