Momentum dependences of charmonium properties from lattice QCD

TL;DR

This paper investigates how the properties of charmonium particles depend on their momentum in a hot medium, using lattice QCD simulations to understand their behavior in heavy ion collisions.

Contribution

It provides novel lattice QCD results on the momentum dependence of charmonium properties at different temperatures, extending previous static studies.

Findings

Charmonium bound states dissociate at temperatures above 1.5 times the critical temperature.

Dispersion relations of screening masses vary with temperature and momentum.

Correlation and spectral functions show significant changes with temperature and momentum.

Abstract

Charmonia produced in initial hard parton scatterings during heavy ion collisions move with respect to the medium rather than flow with the medium. Lattice studies suggest that charmonium bound states at the rest are dissociated at $T\gtrsim 1.5 T_c$. We present results on momentum dependences of charmonium properties in a hot medium from lattice QCD Monte Carlo simulations. The dispersion relation of the screening mass and the change of correlation and spectral functions at various temperatures and momenta are discussed.