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

Journal Article · · European Physical Journal. C, Particles and Fields
 [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)

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.

Research Organization:
Univ. of Houston System, Houston, TX (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-07ER41521
OSTI ID:
1434894
Journal Information:
European Physical Journal. C, Particles and Fields, Vol. 75, Issue 12; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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  • Borsanyi, Szabolcs; Fodor, Zoltan; Katz, Sandor D.
  • Proceedings of From quarks and gluons to hadronic matter: A bridge too far? — PoS(QCD-TNT-III) https://doi.org/10.22323/1.193.0033
conference February 2014
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Equation of State for physical quark masses text January 2009
The QCD equation of state with dynamical quarks text January 2010
Probing freeze-out conditions in heavy ion collisions with moments of charge fluctuations text January 2010
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Revealing baryon number fluctuations from proton number fluctuations in relativistic heavy ion collisions text January 2011
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Volume fluctuations and higher order cumulants of the net baryon number text January 2012
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Event-by-Event Fluctuations in Heavy Ion Collisions and the QCD Critical Point text January 1999
Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration text January 2004
Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions text January 2005
Multiplicity Fluctuations in Hadron-Resonance Gas text January 2006
Fluctuations of particle ratios and the abundance of hadronic resonances text January 1999

Cited By (29)

Search for the QCD critical point with fluctuations of conserved quantities in relativistic heavy-ion collisions at RHIC: an overview journal July 2017
Lattice QCD and heavy ion collisions: a review of recent progress journal July 2018
Sensitivity of multiplicity fluctuations to freeze-out conditions in heavy ion collisions journal December 2015
Dynamical net-proton fluctuations near a QCD critical point journal February 2016
Cumulants of net-proton, net-kaon, and net-charge multiplicity distributions in Au + Au collisions at s N N = 7.7 , 11.5, 19.6, 27, 39, 62.4, and 200 GeV within the UrQMD model journal August 2016
Thermal blurring of event-by-event fluctuations generated by rapidity conversion journal October 2016
Fluctuations as a test of chemical nonequilibrium at energies available at the CERN Large Hadron Collider journal November 2016
Cumulants of event-by-event net-strangeness distributions in Au + Au collisions at s NN = 7.7 200 GeV within an UrQMD model journal July 2017
Higher moments of multiplicity fluctuations in a hadron-resonance gas with exact conservation laws journal September 2017
Noncritical fluctuations of (net) charges and (net) protons from the iebe-vishnu hybrid model journal January 2018
Critical point of nuclear matter and beam-energy dependence of net-proton number fluctuations journal August 2018
Multiplicity fluctuations near the QCD critical point journal August 2017
Thermoelectric effect and Seebeck coefficient for hot and dense hadronic matter journal January 2019
Electrical conductivity and Hall conductivity of a hot and dense hadron gas in a magnetic field: A relaxation time approach journal May 2019
Impact of resonance decays on critical point signals in net-proton fluctuations journal April 2017
Freeze-out conditions from strangeness observables at RHIC journal February 2019
Role of new resonance states on fluctuations and correlations of conserved charges in hadron resonance gas model journal October 2018
Sensitivity of multiplicity fluctuations to freeze-out conditions in heavy ion collisions text January 2015
Dynamical net-proton fluctuations near a QCD critical point text January 2016
Thermal blurring of event-by-event fluctuations provoked by rapidity conversion text January 2016
Higher moments of multiplicity fluctuations in a hadron-resonance gas with exact conservation laws text January 2016
Thermoelectric effect and Seebeck coefficient for hot and dense hadronic matter text January 2018
Electrical conductivity and Hall conductivity of hot and dense hadron gas in a magnetic field: a relaxation time approach text January 2019
The QCD Critical Point and Related Observables journal December 2016
Effects of volume corrections and resonance decays on cumulants of net-charge distributions in a Monte Carlo hadron resonance gas model journal February 2017
Cumulants of multiplicity distributions in most-central heavy-ion collisions text January 2016
Experimental results on charge fluctuations in heavy-ion collisions text January 2016
Thermal-FIST: A package for heavy-ion collisions and hadronic equation of state text January 2019
Freeze-out and thermalization in relativistic heavy ion collisions preprint January 2020