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Title: Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider

Abstract

We compare the mean-over-variance ratio of the net-kaon distribution calculated within a stateof-the-art hadron resonance gas model to the latest experimental data from the Beam Energy Scan at RHIC by the STAR collaboration. Our analysis indicates that it is not possible to reproduce the experimental results using the freeze-out parameters from the existing combined fit of net-proton and net-electric charge mean-over-variance. The strange mesons need about 10-15 MeV higher temperatures than the light hadrons at the highest collision energies. In view of the future Λ fluctuation measurements, we predict the Λ variance-over-mean and skewness-times-variance at the light and strange chemical freeze-out parameters. We observe that the Λ fluctuations are sensitive to the difference in the freeze-out temperatures established in this analysis. Our results have implications for other phenomenological models in the field of relativistic heavy ion collisions.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Houston, TX (United States); Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
OSTI Identifier:
1503929
Alternate Identifier(s):
OSTI ID: 1609827; OSTI ID: 1836813
Grant/Contract Number:  
FG02-07ER41521; SC0019175; PHY-1654219; OAC-1531814; SC0020633
Resource Type:
Published Article
Journal Name:
Physical Review. C
Additional Journal Information:
Journal Name: Physical Review. C Journal Volume: 99 Journal Issue: 3; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; physics; particle correlations & fluctuations; relativistic heavy-ion collisions; thermal & statistical models; Strangeness; chemical freeze-out; heavy-ion collisions; Quantum Chromodynamics

Citation Formats

Bellwied, R., Noronha-Hostler, J., Parotto, P., Portillo Vazquez, I., Ratti, C., and Stafford, J. M. Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.034912.
Bellwied, R., Noronha-Hostler, J., Parotto, P., Portillo Vazquez, I., Ratti, C., & Stafford, J. M. Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider. United States. https://doi.org/10.1103/PhysRevC.99.034912
Bellwied, R., Noronha-Hostler, J., Parotto, P., Portillo Vazquez, I., Ratti, C., and Stafford, J. M. Fri . "Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider". United States. https://doi.org/10.1103/PhysRevC.99.034912.
@article{osti_1503929,
title = {Freeze-out temperature from net-kaon fluctuations at energies available at the BNL Relativistic Heavy Ion Collider},
author = {Bellwied, R. and Noronha-Hostler, J. and Parotto, P. and Portillo Vazquez, I. and Ratti, C. and Stafford, J. M.},
abstractNote = {We compare the mean-over-variance ratio of the net-kaon distribution calculated within a stateof-the-art hadron resonance gas model to the latest experimental data from the Beam Energy Scan at RHIC by the STAR collaboration. Our analysis indicates that it is not possible to reproduce the experimental results using the freeze-out parameters from the existing combined fit of net-proton and net-electric charge mean-over-variance. The strange mesons need about 10-15 MeV higher temperatures than the light hadrons at the highest collision energies. In view of the future Λ fluctuation measurements, we predict the Λ variance-over-mean and skewness-times-variance at the light and strange chemical freeze-out parameters. We observe that the Λ fluctuations are sensitive to the difference in the freeze-out temperatures established in this analysis. Our results have implications for other phenomenological models in the field of relativistic heavy ion collisions.},
doi = {10.1103/PhysRevC.99.034912},
journal = {Physical Review. C},
number = 3,
volume = 99,
place = {United States},
year = {Fri Mar 29 00:00:00 EDT 2019},
month = {Fri Mar 29 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevC.99.034912

Citation Metrics:
Cited by: 32 works
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Figures / Tables:

FIG. 1 FIG. 1: Results for $χ^K_1$ /$χ^K_2$ calculated in the HRG model along the lattice QCD isentropic trajectories (pink, dashed band) compared to $(M/σ^ 2)_K$ data from [27] (gray, full band) across the Beam Energy Scan at STAR.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.