Charmonium Potentials at Finite Temperature

TL;DR

This paper investigates how the interquark potential in charmonium states varies with temperature using lattice QCD techniques, revealing a steeper potential at lower temperatures.

Contribution

It introduces a novel application of the HAL QCD method with non-local operators to study temperature-dependent charmonium potentials on anisotropic lattices.

Findings

Potential becomes steeper as temperature decreases

Used NBS wavefunctions with Maximum Entropy Method

Demonstrated temperature dependence of interquark forces

Abstract

The charmonium states at non-zero temperature are studied on anisotropic lattices with 2 dynamical quark flavours. Non-local operators are used to determine the Nambu-Bethe-Salpeter (NBS) wavefunctions via both conventional fitting methods and the Maximum Entropy Method. The interquark potential is determined from the solution of the Schrodinger equation, given the NBS wavefunction as input following the HAL QCD method. We observe a temperature dependent potential which becomes steeper as the temperature decreases.