Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density
Abstract
The hadron resonance gas (HRG) model is often believed to correctly describe the confined phase of QCD. This assumption is the basis of many phenomenological works on QCD thermodynamics and of the analysis of hadron yields in relativistic heavy ion collisions. We use first principle lattice simulations to calculate corrections to the ideal HRG model. Namely, we determine the subleading fugacity expansion coefficients of the grand canonical free energy, receiving contributions from processes like kaon-kaon or baryon-baryon scattering. We achieve this goal by performing a two dimensional scan on the imaginary baryon number chemical potential (μB)—strangeness chemical potential (μS) plane, where the fugacity expansion coefficients become Fourier coefficients. We carry out a continuum limit estimation of these coefficients by performing lattice simulations with temporal extents of Nτ=8, 10, 12 using the 4stout improved staggered action. We then use the truncated fugacity expansion to extrapolate ratios of baryon number and strangeness fluctuations and correlations to finite chemical potentials. Evaluating the fugacity expansion along the crossover line, we reproduce the trend seen in the experimental data on net-proton fluctuations by the STAR collaboration.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Houston, TX (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); German Research Foundation (DFG); Excellence Initiative of Aix-Marseille University (A*MIDEX); Bundesministerium für Bildung und Forschung (BMBF); National Science Foundation (NSF); Hungarian Academy of Sciences; University of Houston
- OSTI Identifier:
- 1830869
- Alternate Identifier(s):
- OSTI ID: 1979940
- Grant/Contract Number:
- FG02-07ER41521; AC05-00OR22725; KKP126769; 05P18PXFCA; PHY1654219
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 104 Journal Issue: 9; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; lattice QCD; Phase diagrams; QCD phase transitions; quantum chromodynamics; quark-gluon plasma; baryons; strange quark
Citation Formats
Bellwied, Rene, Ratti, Claudia, Borsányi, Szabolcs, Parotto, Paolo, Fodor, Zoltán, Guenther, Jana N., Katz, Sándor D., Pásztor, Attila, Pesznyák, Dávid, and Szabó, Kálmán K. Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density. United States: N. p., 2021.
Web. doi:10.1103/PhysRevD.104.094508.
Bellwied, Rene, Ratti, Claudia, Borsányi, Szabolcs, Parotto, Paolo, Fodor, Zoltán, Guenther, Jana N., Katz, Sándor D., Pásztor, Attila, Pesznyák, Dávid, & Szabó, Kálmán K. Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density. United States. https://doi.org/10.1103/PhysRevD.104.094508
Bellwied, Rene, Ratti, Claudia, Borsányi, Szabolcs, Parotto, Paolo, Fodor, Zoltán, Guenther, Jana N., Katz, Sándor D., Pásztor, Attila, Pesznyák, Dávid, and Szabó, Kálmán K. Wed .
"Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density". United States. https://doi.org/10.1103/PhysRevD.104.094508.
@article{osti_1830869,
title = {Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density},
author = {Bellwied, Rene and Ratti, Claudia and Borsányi, Szabolcs and Parotto, Paolo and Fodor, Zoltán and Guenther, Jana N. and Katz, Sándor D. and Pásztor, Attila and Pesznyák, Dávid and Szabó, Kálmán K.},
abstractNote = {The hadron resonance gas (HRG) model is often believed to correctly describe the confined phase of QCD. This assumption is the basis of many phenomenological works on QCD thermodynamics and of the analysis of hadron yields in relativistic heavy ion collisions. We use first principle lattice simulations to calculate corrections to the ideal HRG model. Namely, we determine the subleading fugacity expansion coefficients of the grand canonical free energy, receiving contributions from processes like kaon-kaon or baryon-baryon scattering. We achieve this goal by performing a two dimensional scan on the imaginary baryon number chemical potential (μB)—strangeness chemical potential (μS) plane, where the fugacity expansion coefficients become Fourier coefficients. We carry out a continuum limit estimation of these coefficients by performing lattice simulations with temporal extents of Nτ=8, 10, 12 using the 4stout improved staggered action. We then use the truncated fugacity expansion to extrapolate ratios of baryon number and strangeness fluctuations and correlations to finite chemical potentials. Evaluating the fugacity expansion along the crossover line, we reproduce the trend seen in the experimental data on net-proton fluctuations by the STAR collaboration.},
doi = {10.1103/PhysRevD.104.094508},
journal = {Physical Review D},
number = 9,
volume = 104,
place = {United States},
year = {Wed Nov 17 00:00:00 EST 2021},
month = {Wed Nov 17 00:00:00 EST 2021}
}
https://doi.org/10.1103/PhysRevD.104.094508
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