In-medium quarkonium properties from a lattice QCD based effective field theory

TL;DR

This paper investigates how heavy quarkonium states behave in the quark-gluon plasma near the crossover temperature using lattice QCD and effective field theory, providing insights into their dissolution patterns.

Contribution

It introduces a lattice QCD based effective field theory approach with a novel Bayesian spectral reconstruction method to study quarkonium properties at finite temperature.

Findings

Sequential melting of quarkonium states observed.

Estimates on the survival of S-wave and P-wave states provided.

Correlator and spectral function temperature dependence analyzed.

Abstract

In order to understand the experimental data on heavy quarkonium production in heavy ion collisions at RHIC and LHC it is necessary (though not sufficient) to pinpoint the properties of heavy $Q\bar{Q}$ bound states in the deconfined quark-gluon plasma, including their dissolution. Here we present recent results on the temperature dependence of bottomonium and charmonium correlators, as well as their spectral functions in a lattice QCD based effective field theory called NRQCD, surveying temperatures close to the crossover transition $140 {\rm MeV} < T< 249 {\rm MeV}$. The spectra are reconstructed based on a novel Bayesian prescription, whose systematic uncertainties are assessed. We present indications for sequential melting of different quarkonium species with respect to their vacuum binding energies and give estimates on the survival of S-wave and P-wave ground states.