J/ψ production at low pT in Au + Au and Cu + Cu collisions at sNN−−−−√=200 GeV with the STAR detector - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2013

J/ψ production at low pT in Au + Au and Cu + Cu collisions at sNN−−−−√=200 GeV with the STAR detector

L. Adamczyk
  • Function : Author

Abstract

The $J/\psi$ $p_T$ spectrum and nuclear modification factor ($R_{\textit{AA}}$) are reported for $p_T < 5$ GeV/c and $|y|<1$ from 0-60% central Au+Au and Cu+Cu collisions at $\sqrt{s_{_{NN}}} =200$ GeV at STAR. A significant suppression of $p_T$-integrated $J/\psi$ production is observed in central Au+Au events, with less suppression observed in Cu+Cu. The $p_T$ dependence of the $R_{\textit{AA}}$ is observed to increase at a higher $p_T$ region. The data are compared with the previously published RHIC results. Comparing with model calculations, it is found that the invariant yields at low $p_T$ are significantly above hydrodynamic flow predictions but are consistent with models that include color screening and regeneration.

Dates and versions

in2p3-00873021 , version 1 (15-10-2013)

Identifiers

Cite

L. Adamczyk, W. Borowski, S. Kabana. J/ψ production at low pT in Au + Au and Cu + Cu collisions at sNN−−−−√=200 GeV with the STAR detector. Physical Review C, 2013, 90, pp.024906. ⟨10.1103/PhysRevC.90.024906⟩. ⟨in2p3-00873021⟩
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