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Screening masses towards chiral limit

Feb 19, 2021

10 pages

Published in:

Acta Phys.Polon.Supp. 14 (2021) 321

Contribution to:

Criticality in QCD and the Hadron Resonance Gas

e-Print:

2102.09916 [hep-lat]

DOI:

10.5506/APHYSPOLBSUPP.14.321 (publication)

View in:

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Abstract: (arXiv)

A possible effective restoration of the anomalous

U_A(1)

symmetry would have a non-trivial effect on the global phase diagram of QCD. In this work we investigate the effective restoration of the

U_A(1)

through the calculation of scalar and pseudo-scalar screening masses and corresponding susceptibilities, for physical and lower than physical pion masses. Calculations have been performed in (2+1)-flavor HISQ discretization scheme with a physical value of the strange quark mass. Preliminary calculations of the continuum extrapolated scalar and pseudo-scalar masses are presented, based on lattices with three different temporal extent. Non-trivial structure of the difference between scalar and pseudo-scalar susceptibilites are discussed for

N_\tau=8

lattices.

Note:

Contribution to the proceeding of workshop "Criticality in QCD and the Hadron Resonance Gas", 29-31 July 2020, Wrocław, Poland

mass: screening
quark: mass
pi: mass
quantum chromodynamics: critical phenomena
lattice
susceptibility
chiral
symmetry: U(1)
mass: scalar
mass: pseudoscalar

References(14)

Figures(8)

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