EPJ Web of Conferences 175, 07029 (2018)
https://doi.org/10.1051/epjconf/201817507029

Degeneracy of vector-channel spatial correlators in high temperature QCD

¹ Institute of Physics, University of Graz, 8010 Graz, Austria
² KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
³ RIKEN BNL Research Center, Brookhaven National Laboratory, Upton NY 11973, USA
⁴ School of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
⁵ Department of Physics, Osaka University, Toyonaka 560-0043, Japan
⁶ School of High Energy Accelerator Science, The Graduate University for Advanced Studies (Sokendai), Tsukuba 305-0801, Japan
⁷ Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana, Slovenia
⁸ Jozef Stefan Institute, 1000 Ljubljana, Slovenia
⁹ Institute für Theoretische Physik, Universität Regensburg, D-93040, Germany

^* Speaker, e-mail: christian.rohrhofer@uni-graz.at

Published online: 26 March 2018

Abstract

We study spatial isovector meson correlators in N_f = 2 QCD with dynamical domain-wall fermions on 32³ × 8 lattices at temperatures up to 380 MeV with various quark masses. We measure the correlators of spin-one isovector operators including vector, axial-vector, tensor and axial-tensor. At temperatures above T_c we observe an approximate degeneracy of the correlators in these channels, which is unexpected because some of them are not related under SU(2)_L×SU(2)_R nor U(1)_A symmetries. The observed approximate degeneracy suggests emergent SU(2)_CS (chiral-spin) and SU(4) symmetries at high T.