Topological Susceptibility in Nf = 2 QCD at Finite Temperature
2018
We study the topological charge in N f = 2 QCD at finite temperature using Mobius domain-wall fermions. The susceptibility X t of the topological charge defined either by the index of overlap Dirac operator or a gluonic operator is investigated at several values of temperature T (> T c ) varying the quark mass. A strong suppression of the susceptibility is observed below a certain value of the quark mass. The relation with the restoration of U A (1) is discussed.
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