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

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 N τ = 6 and perform calculations for six values of quark masses, which in the continuum limit correspond to pion masses in the range 80 MeV ≲ m π ≲ 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 m c π ≲ 50 MeV, below which a region of first-order chiral phase transition is favored.
 [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:
Report Number(s):
Journal ID: ISSN 2470-0010; R&D Project: KB0301020
Grant/Contract Number:
SC0012704; 05P15PBCAA; 11535012; 11521064
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 7; Journal ID: ISSN 2470-0010
American Physical Society (APS)
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)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; lattice QCD; QCD phase transitions; particles and fields
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1351684