Productions of J/psi mesons in p-Pb collisions at 5 TeV

TL;DR

This paper models J/psi meson production in p-Pb collisions at 5 TeV, using a multisource thermal model to describe rapidity and pseudorapidity distributions, and Erlang distribution for transverse momentum, matching experimental data.

Contribution

It introduces a combined thermal and Erlang distribution approach to accurately describe J/psi production distributions in p-Pb collisions at LHC energies.

Findings

Rapidity distributions match LHCb and ALICE data.

Pseudorapidity distributions derived from model parameters.

Transverse momentum distributions fit Erlang distribution.

Abstract

The rapidity distributions of $J/\psi$ mesons produced in proton-lead ($p$-Pb) collisions at center-of-mass energy per nucleon pair $\sqrt{s_{NN}}=5$ TeV are studied by using a multisource thermal model and compared with the experimental data of the LHCb and ALICE Collaborations. Correspondingly, the pseudorapidity distributions are accurately obtained from the parameters extracted from the rapidity distributions. At the same time, the transverse momentum distributions in the same experiments are described by the simplest Erlang distribution which is the folding result of two exponential distributions which are contributed by the target and projectile partons respectively.