Analysis of Kaon fluctuations from the beam energy scan at RHIC

Claudia Ratti; Rene Bellwied; Jacquelyn Noronha-Hostler; Paolo Parotto; Israel Portillo Vazquez; Jamie M. Stafford

doi:10.1016/j.nuclphysa.2018.10.008

Analysis of Kaon fluctuations from the beam energy scan at RHIC

Claudia Ratti, Rene Bellwied, Jacquelyn Noronha-Hostler, Paolo Parotto, Israel Portillo Vazquez, Jamie M. Stafford

Research output: Contribution to journal › Article

Abstract

We analyze the recent STAR collaboration results on net-kaon fluctuations in the framework of the Hadron Resonance Gas (HRG) model. Our purpose is to extract the freeze-out temperature and chemical potential as functions of the collision energy. In our HRG model, we use the complete hadron spectrum from the latest PDG list. These results are compared to the freeze-out parameters obtained from a combined analysis of net-electric charge and net-proton fluctuations. At the highest collision energies, kaons need about 10-15 MeV higher freeze-out temperatures than the light hadrons. Predictions for moment ratios of the net-Lambda multiplicity distribution are obtained along the freeze-out lines. Lambda fluctuations are sensitive to the difference in the freeze-out temperatures observed in our analysis.

Original language	English (US)
Pages (from-to)	799-802
Number of pages	4
Journal	Nuclear Physics A
Volume	982
DOIs	https://doi.org/10.1016/j.nuclphysa.2018.10.008
State	Published - Feb 2019
Externally published	Yes

Keywords

Heavy-ion collisions
QCD thermodynamics
Quark-gluon plasma

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Ratti, C., Bellwied, R., Noronha-Hostler, J., Parotto, P., Portillo Vazquez, I., & Stafford, J. M. (2019). Analysis of Kaon fluctuations from the beam energy scan at RHIC. Nuclear Physics A, 982, 799-802. https://doi.org/10.1016/j.nuclphysa.2018.10.008

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abstract = "We analyze the recent STAR collaboration results on net-kaon fluctuations in the framework of the Hadron Resonance Gas (HRG) model. Our purpose is to extract the freeze-out temperature and chemical potential as functions of the collision energy. In our HRG model, we use the complete hadron spectrum from the latest PDG list. These results are compared to the freeze-out parameters obtained from a combined analysis of net-electric charge and net-proton fluctuations. At the highest collision energies, kaons need about 10-15 MeV higher freeze-out temperatures than the light hadrons. Predictions for moment ratios of the net-Lambda multiplicity distribution are obtained along the freeze-out lines. Lambda fluctuations are sensitive to the difference in the freeze-out temperatures observed in our analysis.",

keywords = "Heavy-ion collisions, QCD thermodynamics, Quark-gluon plasma",

author = "Claudia Ratti and Rene Bellwied and Jacquelyn Noronha-Hostler and Paolo Parotto and {Portillo Vazquez}, Israel and Stafford, {Jamie M.}",

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AU - Ratti, Claudia

AU - Bellwied, Rene

AU - Noronha-Hostler, Jacquelyn

AU - Parotto, Paolo

AU - Portillo Vazquez, Israel

AU - Stafford, Jamie M.

PY - 2019/2

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AB - We analyze the recent STAR collaboration results on net-kaon fluctuations in the framework of the Hadron Resonance Gas (HRG) model. Our purpose is to extract the freeze-out temperature and chemical potential as functions of the collision energy. In our HRG model, we use the complete hadron spectrum from the latest PDG list. These results are compared to the freeze-out parameters obtained from a combined analysis of net-electric charge and net-proton fluctuations. At the highest collision energies, kaons need about 10-15 MeV higher freeze-out temperatures than the light hadrons. Predictions for moment ratios of the net-Lambda multiplicity distribution are obtained along the freeze-out lines. Lambda fluctuations are sensitive to the difference in the freeze-out temperatures observed in our analysis.

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KW - QCD thermodynamics

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