Phenomenological interpolation of the inclusive J/psi cross section to proton-proton collisions at 2.76 TeV and 5.5 TeV

TL;DR

This paper phenomenologically models the inclusive J/psi production cross section at 2.76 TeV and 5.5 TeV, providing essential references for interpreting heavy-ion collision results at the LHC.

Contribution

It introduces a phenomenological interpolation method for J/psi cross sections at different energies, combining pQCD and data-driven fits, to aid in heavy-ion collision analysis.

Findings

Predicted J/psi cross sections at 2.76 TeV and 5.5 TeV

Validated models against ALICE pp collision data at 2.76 TeV

Provided energy, rapidity, and transverse momentum distributions

Abstract

We present a study of the inclusive J/psi cross section at 2.76 TeV and 5.5 TeV. The energy dependence of the cross section, rapidity and transverse momentum distributions are evaluated phenomenologically. Their knowledge is crucial as a reference for the interpretation of A-A and p-A J/psi results at the LHC. Our approach is the following: first, we estimate the energy evolution of the pt-integrated J/psi cross section at mid-rapidity; then, we evaluate the rapidity dependence; finally, we study the transverse momentum distribution trend. Whenever possible, both theory driven (based on pQCD predictions) and functional form (data driven fits) calculations are discussed. Our predictions are compared with the recently obtained results by the ALICE collaboration in pp collisions at 2.76 TeV.