Measurement of inclusive $J/\psi$ suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV through the dimuon channel at STAR - INSPIRE

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Measurement of inclusive $J/\psi$ suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV through the dimuon channel at STAR

STAR

Collaboration

May 31, 2019

28 pages

Published in:

Phys.Lett.B 797 (2019) 134917

Published: Oct 10, 2019

e-Print:

1905.13669 [nucl-ex]

DOI:

10.1016/j.physletb.2019.134917 (publication)

Experiments:

BNL-RHIC-STAR

View in:

ADS Abstract Service

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Abstract: (Elsevier)

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 sNN=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 ( pT ) 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 pT>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 pT 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.

Quark-gluon plasma
Color-screening
J/ψ suppression
J/psi(3100): suppression
quark gluon: plasma
muon: particle identification
dimuon: decay
heavy ion: scattering
STAR
Brookhaven RHIC Coll

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