Superstatistics and the effective QCD phase diagram

Alejandro Ayala (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, CdMx 04510, Mexico; Centre for Theoretical and Mathematical Physics, and Department of Physics, University of Cape Town, Rondebosch 7700, South Africa) ; Martin Hentschinski (Departamento de Actuaria, Física y Matemáticas, Universidad de las Américas Puebla, Santa Catarina Mártir, San Andrés Cholula, 72820 Puebla, Mexico) ; L. A. Hernández (Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-543, CdMx 04510, Mexico; Centre for Theoretical and Mathematical Physics, and Department of Physics, University of Cape Town, Rondebosch 7700, South Africa) ; M. Loewe (Instituto de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile; Centre for Theoretical and Mathematical Physics, and Department of Physics, University of Cape Town, Rondebosch 7700, South Africa; Centro Científico-Tecnológico de Valparaíso CCTVAL, Universidad Técnica Federico Santa María, Casilla 110-V, Valaparaíso, Chile) ; R. Zamora (Instituto de Ciencias Básicas, Universidad Diego Portales, Casilla 298-V, Santiago, Chile; Centro de Investigación y Desarrollo en Ciencias Aeroespaciales (CIDCA), Fuerza Aérea de Chile, Casilla 8020744, Santiago, Chile)

We study the effect of a partially thermalized scenario for chiral symmetry restoration at finite temperature and quark chemical potential, and in particular for the position of the critical end point in an effective description of the QCD phase diagram. We show that these effects cause the critical end point to be displaced towards larger values of temperature and lower values of the quark chemical potential as compared to the case when the system can be regarded as completely thermalized. We conclude that these effects may be important for relativistic heavy-ion collisions where the number of subsystems making up the whole interaction volume can be linked to the finite number of participants in the reaction.

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      "value": "We study the effect of a partially thermalized scenario for chiral symmetry restoration at finite temperature and quark chemical potential, and in particular for the position of the critical end point in an effective description of the QCD phase diagram. We show that these effects cause the critical end point to be displaced towards larger values of temperature and lower values of the quark chemical potential as compared to the case when the system can be regarded as completely thermalized. We conclude that these effects may be important for relativistic heavy-ion collisions where the number of subsystems making up the whole interaction volume can be linked to the finite number of participants in the reaction."
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Published on:
07 December 2018
Publisher:
APS
Published in:
Physical Review D , Volume 98 (2018)
Issue 11
DOI:
https://doi.org/10.1103/PhysRevD.98.114002
arXiv:
1809.04728
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

Fulltext files: