Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV

We study particle yield fluctuations within the statistical hadronization model, considering both chemical equilibrium and non-equilibrium. Considering both the particle yield ratios and the yield fluctuations we show that it is possible to differentiate the chemical freeze-out conditions. As an exa...

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Detalles Bibliográficos
Autores principales: Torrieri, Giorgio, Jeon, Sangyong, Rafelski, Johann
Lenguaje:eng
Publicado: 2005
Materias:
Nuclear Physics - Theory
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.74.024901
http://cds.cern.ch/record/826785
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author Torrieri, Giorgio
Jeon, Sangyong
Rafelski, Johann
author_facet Torrieri, Giorgio
Jeon, Sangyong
Rafelski, Johann
author_sort Torrieri, Giorgio
collection CERN
description We study particle yield fluctuations within the statistical hadronization model, considering both chemical equilibrium and non-equilibrium. Considering both the particle yield ratios and the yield fluctuations we show that it is possible to differentiate the chemical freeze-out conditions. As an example of the procedure we consider the relative yield ratio $\Lambda/K^-$ together with the normalized net charge fluctuation $\ave{\Delta Q^2}/\ave{\Nch}$. We determine quantitatively how these variables constrain the chemical conditions at freeze-out.
id cern-826785
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
record_format invenio
spelling cern-8267852023-03-14T18:17:21Zdoi:10.1103/PhysRevC.74.024901http://cds.cern.ch/record/826785engTorrieri, GiorgioJeon, SangyongRafelski, JohannParticle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeVNuclear Physics - TheoryWe study particle yield fluctuations within the statistical hadronization model, considering both chemical equilibrium and non-equilibrium. Considering both the particle yield ratios and the yield fluctuations we show that it is possible to differentiate the chemical freeze-out conditions. As an example of the procedure we consider the relative yield ratio $\Lambda/K^-$ together with the normalized net charge fluctuation $\ave{\Delta Q^2}/\ave{\Nch}$. We determine quantitatively how these variables constrain the chemical conditions at freeze-out.We study charge fluctuations within the statistical hadronization model. Considering both the particle yield ratios and the charge fluctuations we show that it is possible to differentiate between chemical equilibrium and non-equilibrium freeze-out conditions. As an example of the procedure we show quantitatively how the relative yield ratio $\Lambda/K^-$ together with the normalized net charge fluctuation $v(Q)=\ave{\Delta Q^2}/\ave{\Nch}$ constrain the chemical conditions at freeze-out. We also discuss the influence of the limited detector acceptance on fluctuation measurements, and show how this can be accounted for within a quantitative analysis.nucl-th/0503026CERN-PH-TH-2005-041CERN-PH-TH-2005-041oai:cds.cern.ch:8267852005-03-10
spellingShingle Nuclear Physics - Theory
Torrieri, Giorgio
Jeon, Sangyong
Rafelski, Johann
Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV
title Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV
title_full Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV
title_fullStr Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV
title_full_unstemmed Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV
title_short Particle yield fluctuations and chemical nonequilibrium in Au-Au collisions at $\sqrt{s_NN}$ = 200 GeV
title_sort particle yield fluctuations and chemical nonequilibrium in au-au collisions at $\sqrt{s_nn}$ = 200 gev
topic Nuclear Physics - Theory
url https://dx.doi.org/10.1103/PhysRevC.74.024901
http://cds.cern.ch/record/826785
work_keys_str_mv AT torrierigiorgio particleyieldfluctuationsandchemicalnonequilibriuminauaucollisionsatsqrtsnn200gev
AT jeonsangyong particleyieldfluctuationsandchemicalnonequilibriuminauaucollisionsatsqrtsnn200gev
AT rafelskijohann particleyieldfluctuationsandchemicalnonequilibriuminauaucollisionsatsqrtsnn200gev

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