1. Symmetries of spatial meson correlators in high temperature QCD
- Author
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Shoji Hashimoto, G. Cossu, Yasumichi Aoki, Christian B. Lang, Christof Gattringer, Sasa Prelovsek, Hidenori Fukaya, L. Ya. Glozman, and Christian Rohrhofer
- Subjects
Quark ,High Energy Physics - Theory ,Particle physics ,Meson ,Nuclear Theory ,High Energy Physics::Lattice ,FOS: Physical sciences ,01 natural sciences ,Computer Science::Digital Libraries ,Nuclear Theory (nucl-th) ,High Energy Physics - Phenomenology (hep-ph) ,High Energy Physics - Lattice ,0103 physical sciences ,Symmetry breaking ,010306 general physics ,Multiplet ,Quantum chromodynamics ,Physics ,Isovector ,010308 nuclear & particles physics ,High Energy Physics - Lattice (hep-lat) ,ddc:530 ,High Energy Physics::Phenomenology ,Fermion ,530 Physik ,Gluon ,High Energy Physics - Phenomenology ,High Energy Physics - Theory (hep-th) - Abstract
Based on a complete set of $J = 0$ and $J=1$ spatial isovector correlation functions calculated with $N_F = 2$ domain wall fermions we identify an intermediate temperature regime of $T \sim 220 - 500$ MeV ($1.2T_c$--$2.8T_c$), where chiral symmetry is restored but the correlators are not yet compatible with a simple free quark behavior. More specifically, in the temperature range $T \sim 220 - 500$ MeV we identify a multiplet structure of spatial correlators that suggests emergent $SU(2)_{CS}$ and $SU(4)$ symmetries, which are not symmetries of the free Dirac action. The symmetry breaking effects in this temperature range are less than 5%. Our results indicate that at these temperatures the chromo-magnetic interaction is suppressed and the elementary degrees of freedom are chirally symmetric quarks bound into color-singlet objects by the chromo-electric component of the gluon field. At temperatures between 500 and 660 MeV the emergent $SU(2)_{CS}$ and $SU(4)$ symmetries disappear and one observes a smooth transition to the regime above $T \sim 1$ GeV where only chiral symmetries survive, which are finally compatible with quasi-free quarks., A new figure and discussion added. Accepted for publication in PRD
- Published
- 2019