Chiral spin symmetry and hot QCD
8 February 2024
High Energy Physics - Lattice
L. Ya. Glozman
Indications of three regimes in hot QCD: hadron gas, stringy fluid, quark-gluon plasma
Introduces an electric-sector 'chiral spin symmetry' emerging >155 MeV
Other lattice evidences for stringy fluid regime
Possibility of two phase transitions in large-N_c limit
QCD regimes at increasing temperatures
This paper overviews lattice results indicating three regimes in hot QCD: a hadron gas below 155 MeV; an intermediate 'stringy fluid' from 155-500 MeV with restored chiral symmetry but still confined; and a quark-gluon plasma above 500 MeV. The paper introduces a 'chiral spin symmetry' appearing in the electric sector above chiral restoration. It discusses the possibility these become distinct phases at large N_c, with two phase transitions.
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