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Polyakov Loop Susceptibility and Correlators in the Chiral Limit

Nov 18, 2019
7 pages
Published in:
  • PoS LATTICE2019 (2020) 194
Contribution to:
  • Published: Jan 15, 2020 by SISSA
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Abstract: (arXiv)
In quenched QCD the Polyakov loop is an order parameter of the deconfinement transition, but with decreasing quark mass, the peak in the Polyakov loop susceptibility becomes less pronounced, and it loses its interpretation as an indicator for deconfinement. For this Nf=2+1N_f=2+1 HISQ study, we fix the strange quark mass msm_s at its physical value and investigate the dependence of the Polyakov loop on the light quark mass mlm_l in the range ms/ml=27−160m_s/m_l=27-160, following mlm_l toward the chiral limit. In particular we will look how the inflection point and susceptibility behave as we decrease mlm_l, to see whether one finds any indication of a crossover, and therefore whether the Polyakov loop is sensitive to the chiral phase transition. Preliminary results show no signal of a crossover from the real part of the Polyakov loop in the vicinity of the chiral crossover. Closely related is an investigation of Polyakov loop correlations and the Debye mass in this limit. Preliminary results suggest little or no dependence on mlm_l.
Note:
  • 7 pages, 3 figures, presented at the 37th International Symposium on Lattice Field Theory
  • quark: mass dependence
  • Polyakov loop: susceptibility
  • critical phenomena: chiral
  • mass: Debye
  • quantum chromodynamics: quenching
  • deconfinement
  • correlation function
  • correlation
  • quantum chromodynamics
  • lattice field theory