Hadron resonance gas model with repulsive mean-field interactions: specific heat, isothermal compressibility and speed of sound

Abstract

We investigate the effect of repulsive interaction between hadrons on the specific heat ($C_V$), isothermal compressibility (${\kappa }_T$) and the speed of sound ($C_s^2$) of hot and dense hadronic matter. The repulsive interactions are included through a mean-field approach where the single particle energy picks correction term due to mean field interactions between hadrons. This correction term is proportional to the number density of hadrons. We assume different mean-field interactions for mesons and baryons. We also confront $C_V$ and $C_s^2$ with existing lattice QCD simulation results. We find that the repulsive interactions have very strong effect on $C_V$ and $C_s^2$ while its effect on ${\kappa }_T$ is very mild. We finally discuss the implications of our results in the context of heavy-ion collision experiments.

23 pages, 4 figures

References in corpus (7)

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• The Phase Structure of the Polyakov--Quark-Meson Model
• The phase structure of the Polyakov--quark-meson model beyond mean field
• Susceptibilities near the QCD (tri)critical point
• Repulsive baryonic interactions and lattice QCD observables at imaginary chemical potential
• New scenarios for hard-core interactions in a hadron resonance gas
• Effects of hadronic repulsive interactions on the fluctuations of conserved charges

Cited by in corpus (7)

• On the Sound Speed in Neutron Stars
• A general, scale-independent description of the sound speed in neutron stars
• Impact of large-mass constraints on the properties of neutron stars
• Effect of a magnetic field on the thermodynamic properties of a high-temperature hadron resonance gas with van der Waals interactions
• Anisotropy of magnetized quark matter
• Chiral condensate and the equation of state at nonzero baryon density from the hadron resonance gas model with a repulsive mean field
• Can charm fluctuation be a better probe to study QCD critical point?