Charmonia suppression in heavy ion collisions: Hot versus cold matter effects

I. Schmidt, M. Siddikov, and M. Musakhanov
Phys. Rev. C 98, 025207 – Published 28 August 2018

Abstract

In this paper we study charmonium suppression in heavy ion collisions and develop a joint microscopic description of the initial- and final-state interactions. In the cold phase, we consider a conventional mechanism of nuclear suppression due to inelastic absorptive interactions. We also take into account a novel production mechanism via fusion of three gluons from different nucleons, which partially compensates the strong suppression of the first term expected in the Large Hadron Collider (LHC) kinematics. In the hot phase, we take into account both the Debye screening and the absorptive correction due to color-exchange interactions with the medium. We found that the latter mechanism becomes dominant for large transverse momenta pT10GeV. The evaluated suppression RAA in our approach is in reasonable agreement with recent experimental data for J/ψ and ψ(2S) in the LHC kinematics.

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  • Received 13 March 2018
  • Revised 13 June 2018

DOI:https://doi.org/10.1103/PhysRevC.98.025207

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

Authors & Affiliations

I. Schmidt1, M. Siddikov1,*, and M. Musakhanov2

  • 1Departamento de Física, Centro Científico-Tecnológico de Valparaíso, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso, Chile
  • 2Department of Theoretical Physics, Uzbekistan National University, Tashkent 700174, Uzbekistan

  • *Corresponding author: marat.siddikov@usm.cl

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Vol. 98, Iss. 2 — August 2018

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