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arXiv · 2206.04579

Chiral condensate from a hadron resonance gas model

Deeptak Biswas·Peter Petreczky·Sayantan Sharma
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Abstract

In this work we address the question of how well the chiral crossover transition can be understood in terms of a noninteracting hadron resonance gas model. Using the latest results on the variation of hadron masses as a function of the pion mass from lattice quantum chromodynamics, we study the temperature dependence of the renormalized chiral condensate in 2+1 flavor QCD. Furthermore, we suggest a better criterion to estimate of the pseudocritical temperature, which gives $T_c = 161.2 \pm 1.7$ MeV, which is much improved compared to all the earlier results within the hadron resonance gas model or chiral perturbation theory. For the curvature of the pseudocritical line we find $\kappa_2 = 0.0203(7)$, which is in very good agreement with continuum extrapolated lattice results.

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Deeptak Biswas, Peter Petreczky, Sayantan Sharma. 2022-06-09. Chiral condensate from a hadron resonance gas model. https://doi.org/10.1103/physrevc.106.045203

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