New scenarios for hard-core interactions in a hadron resonance gas

Abstract

The equation of state of a baryon-symmetric hadronic matter with hard-sphere interactions is studied. It is assumed that mesons are point-like, but baryons and antibaryons have the same hard-core radius rB. Three possibilities are considered: 1) the baryon-baryon and antibaryon-baryon interactions are the same; 2) baryons do not interact with antibaryons; 3) the baryon-antibaryon and meson-(anti)baryon interactions are negligible. By choosing the parameter rB=0.3-0.6 fm, we calculate the nucleon to pion ratio as a function of temperature and perform the fit of hadron yields measured in central Pb+Pb collisions at the bombarding energy Ecm=2.76 TeV per nucleon pair. New nontrivial effects in the interacting hadron resonance gas at temperatures 150-200 MeV are found.

30 pages, 11 figures

References in corpus (6)

• The equation of state in (2+1)-flavor QCD
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Matching Excluded Volume Hadron Resonance Gas Models and Perturbative QCD to Lattice Calculations
• Centrality dependence of hadronization and chemical freeze-out conditions in heavy ion collisions at \sqrt s_{NN} = 2.76 TeV
• Simple Solution to the Strangeness Horn Description Puzzle
• Equation of state and sound velocity of hadronic gas with hard-core interaction

Cited by in corpus (14)

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• Hadron resonance gas with van der Waals interactions
• Ambiguities in the hadro-chemical freeze-out of Au+Au collisions at SIS18 energies and how to resolve them
• Light nuclei in the hadron resonance gas
• Equation of state of neutron star matter and its warm extension with an interacting hadron resonance gas
• Hadron resonance gas model with repulsive mean-field interactions: specific heat, isothermal compressibility and speed of sound
• Hadron Resonance Gas Model for An Arbitrarily Large Number of Different Hard-Core Radii
• Cooper-Frye sampling with short-range repulsion
• Effect of finite volume on thermodynamics of quark-hadron matter
• Constraining the hadronic spectrum and repulsive interactions in a hadron resonance gas via fluctuations of conserved charges
• Shear viscosity from perturbative Quantum Chromodynamics to the hadron resonance gas at finite baryon, strangeness, and electric charge densities
• Lattice-based equation of state with a critical point from constant entropy contours and its comparison to effective QCD approaches