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Title: Chiral phase structure of three flavor QCD at vanishing baryon number density

Abstract

In this paper, we investigate the phase structure of QCD with three degenerate quark flavors as a function of the degenerate quark masses at vanishing baryon number density. We use the highly improved staggered quarks on lattices with temporal extent Nτ = 6 and perform calculations for six values of quark masses, which in the continuum limit correspond to pion masses in the range 80 MeV ≲ mπ ≲ 230 MeV. By analyzing the volume and temperature dependence of the chiral condensate and chiral susceptibility, we find no direct evidence for a first-order phase transition in this range of pion mass values. Finally, relying on the universal scaling behaviors of the chiral observables near an anticipated chiral critical point, we estimate an upper bound for the critical pion mass mcπ ≲ 50 MeV, below which a region of first-order chiral phase transition is favored.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [5]
  1. Michigan State Univ., East Lansing, MI (United States)
  2. Central China Normal Univ., Wuhan (China)
  3. Indian Inst. of Science, Bangalore (India)
  4. Bielefeld Univ. (Germany); Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Bielefeld Univ. (Germany)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Central China Normal Univ., Wuhan (China); Bielefeld Univ. (Germany)
Sponsoring Org.:
USDOE; German Federal Ministry of Education and Research (BMBF); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1392298
Alternate Identifier(s):
OSTI ID: 1351684
Report Number(s):
BNL-114263-2017-JA
Journal ID: ISSN 2470-0010; R&D Project: KB0301020
Grant/Contract Number:  
SC0012704; 05P15PBCAA; 11535012; 11521064
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; lattice QCD; QCD phase transitions; particles and fields

Citation Formats

Bazavov, A., Ding, H. -T., Hegde, P., Karsch, F., Laermann, E., Mukherjee, Swagato, Petreczky, P., and Schmidt, C. Chiral phase structure of three flavor QCD at vanishing baryon number density. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.074505.
Bazavov, A., Ding, H. -T., Hegde, P., Karsch, F., Laermann, E., Mukherjee, Swagato, Petreczky, P., & Schmidt, C. Chiral phase structure of three flavor QCD at vanishing baryon number density. United States. doi:10.1103/PhysRevD.95.074505.
Bazavov, A., Ding, H. -T., Hegde, P., Karsch, F., Laermann, E., Mukherjee, Swagato, Petreczky, P., and Schmidt, C. Wed . "Chiral phase structure of three flavor QCD at vanishing baryon number density". United States. doi:10.1103/PhysRevD.95.074505. https://www.osti.gov/servlets/purl/1392298.
@article{osti_1392298,
title = {Chiral phase structure of three flavor QCD at vanishing baryon number density},
author = {Bazavov, A. and Ding, H. -T. and Hegde, P. and Karsch, F. and Laermann, E. and Mukherjee, Swagato and Petreczky, P. and Schmidt, C.},
abstractNote = {In this paper, we investigate the phase structure of QCD with three degenerate quark flavors as a function of the degenerate quark masses at vanishing baryon number density. We use the highly improved staggered quarks on lattices with temporal extent Nτ = 6 and perform calculations for six values of quark masses, which in the continuum limit correspond to pion masses in the range 80 MeV ≲ mπ ≲ 230 MeV. By analyzing the volume and temperature dependence of the chiral condensate and chiral susceptibility, we find no direct evidence for a first-order phase transition in this range of pion mass values. Finally, relying on the universal scaling behaviors of the chiral observables near an anticipated chiral critical point, we estimate an upper bound for the critical pion mass mcπ ≲ 50 MeV, below which a region of first-order chiral phase transition is favored.},
doi = {10.1103/PhysRevD.95.074505},
journal = {Physical Review D},
number = 7,
volume = 95,
place = {United States},
year = {2017},
month = {4}
}

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