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Title: Impact of resonance regeneration and decay on the net proton fluctuations in a hadron resonance gas

Abstract

We investigate net proton fluctuations as important observables measured in heavy-ion collisions within the hadron resonance gas (HRG) model. Special emphasis is given to effects which are a priori not inherent in a thermally and chemically equilibrated HRG approach. In particular, we point out the importance of taking into account the successive regeneration and decay of resonances after the chemical freeze-out, which lead to a randomization of the isospin of nucleons and thus to additional fluctuations in the net proton number. In conclusion, we find good agreement between our model results and the recent STAR measurements of the higher-order moments of the net proton distribution.

Authors:
 [1];  [2];  [3];  [4];  [4]
  1. Duke Univ., Durham, NC (United States); Frankfurt Institute for Advanced Studies (FIAS), Frankfurt am Main (Germany)
  2. North Carolina State Univ., Raleigh, NC (United States)
  3. Univ. degli Studi di Torino and INFN, Turin (Italy)
  4. Univ. of Houston, Houston, TX (United States)
Publication Date:
Research Org.:
Univ. of Houston System, Houston, TX (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1434894
Grant/Contract Number:  
FG02-07ER41521
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 75; Journal Issue: 12; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadronic Phase; Resonance Decay; Statistical Hadronization Model; Final Proton; Stable Hadron

Citation Formats

Nahrgang, Marlene, Bluhm, Marcus, Alba, Paolo, Bellwied, Rene, and Ratti, Claudia. Impact of resonance regeneration and decay on the net proton fluctuations in a hadron resonance gas. United States: N. p., 2015. Web. doi:10.1140/epjc/s10052-015-3775-0.
Nahrgang, Marlene, Bluhm, Marcus, Alba, Paolo, Bellwied, Rene, & Ratti, Claudia. Impact of resonance regeneration and decay on the net proton fluctuations in a hadron resonance gas. United States. doi:10.1140/epjc/s10052-015-3775-0.
Nahrgang, Marlene, Bluhm, Marcus, Alba, Paolo, Bellwied, Rene, and Ratti, Claudia. Tue . "Impact of resonance regeneration and decay on the net proton fluctuations in a hadron resonance gas". United States. doi:10.1140/epjc/s10052-015-3775-0. https://www.osti.gov/servlets/purl/1434894.
@article{osti_1434894,
title = {Impact of resonance regeneration and decay on the net proton fluctuations in a hadron resonance gas},
author = {Nahrgang, Marlene and Bluhm, Marcus and Alba, Paolo and Bellwied, Rene and Ratti, Claudia},
abstractNote = {We investigate net proton fluctuations as important observables measured in heavy-ion collisions within the hadron resonance gas (HRG) model. Special emphasis is given to effects which are a priori not inherent in a thermally and chemically equilibrated HRG approach. In particular, we point out the importance of taking into account the successive regeneration and decay of resonances after the chemical freeze-out, which lead to a randomization of the isospin of nucleons and thus to additional fluctuations in the net proton number. In conclusion, we find good agreement between our model results and the recent STAR measurements of the higher-order moments of the net proton distribution.},
doi = {10.1140/epjc/s10052-015-3775-0},
journal = {European Physical Journal. C, Particles and Fields},
number = 12,
volume = 75,
place = {United States},
year = {2015},
month = {12}
}

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Cited by: 31 works
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