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Rohrhofer, C.; Aoki, Y.; Cossu, G.; Fukaya, H.; Glozman, L. Ya; Hashimoto, S.; Lang, C. B.; Prelovsek, S.
Physical review. D, 11/2017, Letnik: 96, Številka: 9Journal Article
We study spatial isovector meson correlators in Nf=2 QCD with dynamical domain-wall fermions on 323×8 lattices at temperatures T=220–380 MeV. We measure the correlators of spin-one (J=1) operators including vector, axial-vector, tensor and axial-tensor. Restoration of chiral U(1)A and SU(2)L×SU(2)R symmetries of QCD implies degeneracies in vector–axial-vector (SU(2)L×SU(2)R) and tensor–axial-tensor (U(1)A) pairs, which are indeed observed at temperatures above Tc. Moreover, we observe an approximate degeneracy of all J=1 correlators with increasing temperature. This approximate degeneracy suggests emergent SU(2)CS and SU(4) symmetries at high temperatures, that mix left- and right-handed quarks.
