Fluctuating temperature and baryon chemical potential in heavy-ion collisions and the position of the critical end point in the effective QCD phase diagram
Abstract
We use the linear sigma model with quarks to locate the critical end point in the effective QCD phase diagram accounting for fluctuations in the temperature and quark chemical potential. For this purpose, we use the nonequilibrium formalism provided by the superstatistics framework. We compute the effective potential in the high- and low-temperature approximations up to sixth order and include the contribution of ring diagrams to account for plasma screening effects. We fix the model parameters from relations between the thermal sigma and pion masses imposing a first-order phase transition at zero temperature and a finite critical value for the baryon chemical potential that we take of the order of the nucleon mass. We find that the critical end point displacement due to fluctuations in the temperature and/or quark chemical potential is almost negligible.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Fund for Scientific and Technological Development (FONDECYT); Simons Foundation
- OSTI Identifier:
- 1615535
- Alternate Identifier(s):
- OSTI ID: 1799984
- Grant/Contract Number:
- FG02-00ER41132; IG100219; 1200483; 557037
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Astronomy & Astrophysics; Physics
Citation Formats
Ayala, Alejandro, Hernández-Ortiz, Saul, Hernández, L. A., Knapp-Pérez, Víctor, and Zamora, R. Fluctuating temperature and baryon chemical potential in heavy-ion collisions and the position of the critical end point in the effective QCD phase diagram. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.101.074023.
Ayala, Alejandro, Hernández-Ortiz, Saul, Hernández, L. A., Knapp-Pérez, Víctor, & Zamora, R. Fluctuating temperature and baryon chemical potential in heavy-ion collisions and the position of the critical end point in the effective QCD phase diagram. United States. https://doi.org/10.1103/PhysRevD.101.074023
Ayala, Alejandro, Hernández-Ortiz, Saul, Hernández, L. A., Knapp-Pérez, Víctor, and Zamora, R. Mon .
"Fluctuating temperature and baryon chemical potential in heavy-ion collisions and the position of the critical end point in the effective QCD phase diagram". United States. https://doi.org/10.1103/PhysRevD.101.074023.
@article{osti_1615535,
title = {Fluctuating temperature and baryon chemical potential in heavy-ion collisions and the position of the critical end point in the effective QCD phase diagram},
author = {Ayala, Alejandro and Hernández-Ortiz, Saul and Hernández, L. A. and Knapp-Pérez, Víctor and Zamora, R.},
abstractNote = {We use the linear sigma model with quarks to locate the critical end point in the effective QCD phase diagram accounting for fluctuations in the temperature and quark chemical potential. For this purpose, we use the nonequilibrium formalism provided by the superstatistics framework. We compute the effective potential in the high- and low-temperature approximations up to sixth order and include the contribution of ring diagrams to account for plasma screening effects. We fix the model parameters from relations between the thermal sigma and pion masses imposing a first-order phase transition at zero temperature and a finite critical value for the baryon chemical potential that we take of the order of the nucleon mass. We find that the critical end point displacement due to fluctuations in the temperature and/or quark chemical potential is almost negligible.},
doi = {10.1103/PhysRevD.101.074023},
journal = {Physical Review D},
number = 7,
volume = 101,
place = {United States},
year = {Mon Apr 20 00:00:00 EDT 2020},
month = {Mon Apr 20 00:00:00 EDT 2020}
}
https://doi.org/10.1103/PhysRevD.101.074023
Web of Science
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