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High Energy Physics - Phenomenology

arXiv:1308.1712 (hep-ph)
[Submitted on 7 Aug 2013]

Title:Constant Trace Anomaly as a Universal Condition for the Chemical Freeze-Out

Authors:A. Tawfik (WLCAPP, Cairo & Egyptian Ctr. Theor. Phys., Cairo)
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Abstract:Finding out universal conditions describing the freeze-out parameters was a subject of various phenomenological studies. In the present work, we introduce a new condition based on constant trace anomaly (or interaction measure) calculated in the hadron resonance gas (HRG) model. Various extensions to the {\it ideal} HRG which are conjectured to take into consideration different types of interactions have been analysed. When comparing HRG thermodynamics to that of lattice quantum chromodynamics, we conclude that the hard-core radii are practically irrelevant, especially when HRG includes all resonances with masses less than $2~$GeV. It is found that the constant trace anomaly (or interaction measure) agrees well with most of previous conditions.
Comments: 15 pages, 3 figures with 4 eps graphs
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: ECTP-2013-06
Cite as: arXiv:1308.1712 [hep-ph]
  (or arXiv:1308.1712v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1308.1712
Journal reference: Phys. Rev. C 88, 035203 (2013)
Related DOI: https://doi.org/10.1103/PhysRevC.88.035203

Submission history

From: A. Tawfik [view email]
[v1] Wed, 7 Aug 2013 22:51:15 UTC (22 KB)
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