The thermodynamics of heavy light hadrons at freezeout

TL;DR

This paper uses lattice QCD to analyze correlations of open strange and charm hadrons near the freeze-out temperature, estimating the validity of the hadron resonance gas model and the melting point of heavy-light hadrons.

Contribution

It provides a lattice QCD study of open heavy flavor correlations to determine the temperature range where HRG models are valid and estimates the melting temperature of heavy-light hadrons.

Findings

HRG model describes correlations up to a certain temperature.

Estimated melting temperature of heavy-light hadrons.

Limits on HRG applicability in open flavor channels.

Abstract

In the discussion of hadronization at or close to the freeze-out curve statistical (hadron resonance gas) models play an important role. In particular, in the charmonium sector, regeneration models are considered which rely on the fact that charmonium states can form again already at temperatures well above the QCD transition or hadronization temperature. An important ingredient in these considerations is the regeneration or hadronization of open charm states. In this talk we report on a lattice QCD analysis of correlations of open strange and charm with other conserved quantum numbers like the net baryon number and electric charge. We analyze the temperature range in which an uncorrelated hadron resonance gas (HRG) provides an adequate description of such correlations. This limits the range of validity of HRG based thermodynamics in open flavor channels and provides an estimate for the melting temperature of heavy-light hadrons.