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- Title
Universal descriptions of chemical freeze-out based on pressure and specific heat.
- Authors
Samanta, Subhasis
- Abstract
The lattice QCD data of pressure and the energy density have been used to extract the hadronic radius parameter of the excluded volume hadron resonance gas (EVHRG) model. The equation of state can be described well with the extracted radius parameter Rh=0.15 fm. Specific heat is also calculated in the EVHRG model. Further, two new universal descriptions of chemical freeze-out parameters have been introduced based on pressure and specific heat, respectively. It is shown that the chemical freeze-out parameters obtained at various sNN in ideal hadron resonance gas (HRG) model approximately correspond to P/T4=0.88 and CV/T3=47, respectively. These two quantities are important to describe the thermodynamic properties of the hadronic matter created in heavy-ion collision experiment. The sensitivity of universal chemical freeze-out lines on repulsive interaction is also studied. It has been observed that the behaviors of chemical freeze-out lines for P/T4 and CV/T3 in EVHRG model remain similar to ideal HRG model for the best fit value of hadronic radii.
- Subjects
QUANTUM chromodynamics; SPECIFIC heat; PARAMETER estimation; HADRONS; EQUATIONS of state
- Publication
International Journal of Modern Physics E: Nuclear Physics, 2018, Vol 27, Issue 6, pN.PAG
- ISSN
0218-3013
- Publication type
Article
- DOI
10.1142/S0218301318500477