QCD phase transition in the chiral limit

Abstract

We present a lattice QCD based determination of the chiral phase transition temperature in QCD with two massless (up and down) and one strange quark having its physical mass. 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 $58\mathrm{MeV}\lesssim m_{\pi }\lesssim 163\mathrm{MeV}$. The chiral phase transition temperature is determined by extrapolating to vanishing pion mass using universal scaling analysis. After thermodynamic, continuum and chiral extrapolations we find the chiral phase transition temperature $T_c^0=132_{-6}^{+3}$ MeV. We also present some preliminary calculations on interplay of effective $U_A(1)$ restoration and chiral phase transition towards chiral limit.

arXiv commentPrepared for the proceeding of NIC Symposium 2020 held at Jülich, Germany. Based on arXiv:1903.04801. Link to the proceeding contributions : http://hdl.handle.net/2128/24435

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Cited by in corpus (7)

• Dynamics of the $O(4)$ critical point in QCD
• Degeneracy patterns of chiral companions at finite temperature
• Light quarks at finite temperature: chiral restoration and the fate of the $U(1{)}_A$ symmetry
• QCD transition at the physical point, and its scaling window from twisted mass Wilson fermions
• Gliding down the QCD transition line, from $N_f=2$ till the onset of conformality
• Transport near the chiral critical point
• Soft pions and transport near the chiral critical point