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.
Keywords
Cite
@article{arxiv.1610.08753,
title = {New scenarios for hard-core interactions in a hadron resonance gas},
author = {L. M. Satarov and V. Vovchenko and P. Alba and M. I. Gorenstein and H. Stoecker},
journal= {arXiv preprint arXiv:1610.08753},
year = {2017}
}
Comments
30 pages, 11 figures