Improving the J/psi Production Baseline at RHIC and the LHC

TL;DR

This paper refines the theoretical baseline for J/psi production at RHIC and LHC by analyzing uncertainties in the Color Evaporation Model, incorporating updated charm quark parameters and cold matter effects.

Contribution

It provides improved baseline calculations for J/psi production by assessing uncertainties and including cold matter effects within the CEM framework.

Findings

Quantified uncertainties in J/psi cross sections

Provided updated baseline predictions for RHIC and LHC

Analyzed cold matter effects at different orders

Abstract

We assess the theoretical uncertainties on the inclusive J/psi production cross section in the Color Evaporation Model (CEM) using values for the charm quark mass, renormalization and factorization scales obtained from a fit to the charm production data. We use our new results to provide improved baseline comparison calculations at RHIC and the LHC. We also study cold matter effects on J/psi production at leading relative to next-to-leading order in the CEM within this approach.