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Title: Evaluation of particle–anti-particle scaled correlation within effective models

Abstract

Correlations and fluctuations of physical quantities are known to play an important role in phase transitions and critical phenomena. In recent years some experimental attempts were made in the scope of the Beam Energy Scan program to locate a possible critical point in the QCD phase diagram. In this work we use the Nambu–Jona-Lasinio model to investigate the off-diagonal quark susceptibility, which is related to the quark–anti-quark scaled correlation at the mean field level. We show that this correlation has a significant peak near the critical point and, therefore, may be a useful quantity to measure in experiment. We further study the effects of a repulsive vector coupling, which reduces the strength of the scaled correlation near the critical point.

Authors:
ORCiD logo [1];  [2];  [3]
  1. Univ. Estadual Paulista, São Paulo, SP (Brazil)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Univ. Federal de Santa Catarina, Florianópolis, SC (Brazil); Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1580998
Alternate Identifier(s):
OSTI ID: 1574082
Grant/Contract Number:  
AC02-05CH11231; 150327/2017-0; 303846/2017-8
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 994; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Scaled correlation; Off-diagonal quark susceptibility; Beam Energy Scan data; QCD phase diagram

Citation Formats

Garcia, André F., Koch, Volker, and Pinto, Marcus B. Evaluation of particle–anti-particle scaled correlation within effective models. United States: N. p., 2019. Web. doi:10.1016/j.nuclphysa.2019.121655.
Garcia, André F., Koch, Volker, & Pinto, Marcus B. Evaluation of particle–anti-particle scaled correlation within effective models. United States. https://doi.org/10.1016/j.nuclphysa.2019.121655
Garcia, André F., Koch, Volker, and Pinto, Marcus B. Wed . "Evaluation of particle–anti-particle scaled correlation within effective models". United States. https://doi.org/10.1016/j.nuclphysa.2019.121655. https://www.osti.gov/servlets/purl/1580998.
@article{osti_1580998,
title = {Evaluation of particle–anti-particle scaled correlation within effective models},
author = {Garcia, André F. and Koch, Volker and Pinto, Marcus B.},
abstractNote = {Correlations and fluctuations of physical quantities are known to play an important role in phase transitions and critical phenomena. In recent years some experimental attempts were made in the scope of the Beam Energy Scan program to locate a possible critical point in the QCD phase diagram. In this work we use the Nambu–Jona-Lasinio model to investigate the off-diagonal quark susceptibility, which is related to the quark–anti-quark scaled correlation at the mean field level. We show that this correlation has a significant peak near the critical point and, therefore, may be a useful quantity to measure in experiment. We further study the effects of a repulsive vector coupling, which reduces the strength of the scaled correlation near the critical point.},
doi = {10.1016/j.nuclphysa.2019.121655},
journal = {Nuclear Physics. A},
number = C,
volume = 994,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:

Figures / Tables:

FIG. 1 FIG. 1: Baryon–anti-baryon scattering with the exchange of a sigma mode.

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