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Chiral phase transition temperature in 3-flavor QCD

Dini, L and Hegde, P and Karsch, F and Lahiri, A and Schmidt, C and Sharma, S (2022) Chiral phase transition temperature in 3-flavor QCD. In: 38th International Symposium on Lattice Field Theory, LATTICE 2021, 26 - 30 July 2021, Virtual, Online.

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Official URL: https://doi.org/10.1103/PhysRevD.105.034510


Establishing whether or not the famous first order corner at small quark masses exists in the Columbia plot is one of the major open issues in studies of the phase diagram of QCD. We delve into this problem and present results from our study of the chiral limit in 3-flavor QCD using the Highly Improved Staggered Quark (HISQ/tree) action. We investigate four quark masses, which in the continuum correspond to pion masses in the range 80 MeV to 140 MeV. In our simulations, the temporal lattice size, Nτ, is fixed to be equal to 8, and we explore three different aspect ratios Nσ/Nτ = 3, 4 and 5. In the pion mass range explored by us, we do not find any direct evidence of the existence of a first order phase transition. We find the quark mass and volume dependence of the chiral observables to be well-described by the finite size scaling functions belonging to 3-d, O(2) universality class. We determine the chiral phase transition temperature at this value of finite lattice spacing to be Tc = 98+−36 MeV.

Item Type: Conference Paper
Publication: Proceedings of Science
Publisher: Sissa Medialab Srl
Additional Information: The copyright for this article belongs to the Sissa Medialab Srl.
Keywords: Aspect ratio; Hadrons; Temperature, Aspect-ratio; Chiral phase transitions; Columbia; Finite-size scaling functions; First order; First-order phase transitions; Lattice size; Phase transition temperatures; Quark mass; Staggered quarks, Phase diagrams
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 04 Aug 2022 09:46
Last Modified: 04 Aug 2022 09:46
URI: https://eprints.iisc.ac.in/id/eprint/75294

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