Quarkonium polarization in Pb+Pb collisions in the improved color evaporation model

Abstract

We apply our calculation of direct $J/\psi$ production in the improved color evaporation mode at $\mathcal{O}({\alpha }_s^3)$ in collinear factorization to Pb+Pb collisions. The cold nuclear matter effects of nuclear modifications of the parton densities and intrinsic transverse momentum broadening are included. We find that the polarization is independent of these effects. Our calculations are compared to the Pb+Pb polarization parameters extracted by the ALICE Collaboration at $\sqrt{s_{NN}}=5.02$ TeV.

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Cited by in corpus (3)

• Quarkonium Polarization in Medium from Open Quantum Systems and Chromomagnetic Correlators
• $J/\psi$ and $\psi$(2S) polarization in proton-proton collisions at energies available at the CERN Large Hadron Collider using PYTHIA8
• $J/\psi$ photoproduction and polarization in $e+p$ collisions in the improved color evaporation model