Stabilizing hadron resonance gas models

Chatterjee, S. ; Godbole, R. M. ; Gupta, Sourendu (2010) Stabilizing hadron resonance gas models Physical Review C, 81 (4). 044907_1-044907_7. ISSN 0556-2813

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We examine the stability of hadron resonance gas models by extending them to include undiscovered resonances through the Hagedorn formula. We find that the influence of unknown resonances on thermodynamics is large but bounded. We model the decays of resonances and investigate the ratios of particle yields in heavy-ion collisions. We find that observables such as hydrodynamics and hadron yield ratios change little upon extending the model. As a result, heavy-ion collisions at the RHIC and LHC are insensitive to a possible exponential rise in the hadronic density of states, thus increasing the stability of the predictions of hadron resonance gas models in this context. Hadron resonance gases are internally consistent up to a temperature higher than the crossover temperature in QCD, but by examining quark number susceptibilities we find that their region of applicability ends below the QCD crossover.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:93552
Deposited On:20 Jun 2012 10:46
Last Modified:19 May 2016 06:37

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