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Chiral Phase Transition Temperature in (2+1)-Flavor QCD

H.-T. Ding, P. Hegde, O. Kaczmarek, F. Karsch, Anirban Lahiri, S.-T. Li, Swagato Mukherjee, H. Ohno, P. Petreczky, C. Schmidt, and P. Steinbrecher (HotQCD Collaboration)
Phys. Rev. Lett. 123, 062002 – Published 8 August 2019
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Abstract

We present a lattice-QCD-based determination of the chiral phase transition temperature in QCD with two degenerate, massless quarks and a physical strange quark mass using lattice QCD calculations with the highly improved staggered quarks action. We propose and calculate two novel estimators for the chiral transition temperature for several values of the light quark masses, corresponding to Goldstone pion masses in the range of 58MeVmπ163MeV. The chiral phase transition temperature is determined by extrapolating to vanishing pion mass using universal scaling analysis. Finite-volume effects are controlled by extrapolating to the thermodynamic limit using spatial lattice extents in the range of 2.8–4.5 times the inverse of the pion mass. Continuum extrapolations are carried out by using three different values of the lattice cutoff, corresponding to lattices with temporal extents Nτ=6, 8, and 12. After thermodynamic, continuum, and chiral extrapolations, we find the chiral phase transition temperature Tc0=1326+3MeV.

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  • Received 14 March 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.062002

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

H.-T. Ding1, P. Hegde2, O. Kaczmarek1,3, F. Karsch3,4, Anirban Lahiri3, S.-T. Li1, Swagato Mukherjee4, H. Ohno5, P. Petreczky4, C. Schmidt3, and P. Steinbrecher4 (HotQCD Collaboration)

  • 1Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China
  • 2Center for High Energy Physics, Indian Institute of Science, Bangalore 560012, India
  • 3Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany
  • 4Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 5Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan

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Issue

Vol. 123, Iss. 6 — 9 August 2019

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