Chiral spin symmetry and the QCD phase diagram

Glozman, Leonid Ya.; Philipsen, Owe; Pisarski, Robert D.

doi:10.1140/epja/s10050-022-00895-4

Chiral spin symmetry and the QCD phase diagram

Journal Article · Thu Dec 15 00:00:00 EST 2022 · European Physical Journal. A, Hadrons and Nuclei (Online)

DOI:https://doi.org/10.1140/epja/s10050-022-00895-4· OSTI ID:1969918

Glozman, Leonid Ya. ^[1]; Philipsen, Owe ^[2]; Pisarski, Robert D. ^[3]

Univ. of Graz (Austria)
Goethe Univ., Frankfurt (Germany)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Lattice QCD simulations with chirally symmetric quarks have recently established approximate SU(2)_CS and SU(2N_F) symmetries of the quantum effective action in a temperature range above the chiral crossover T_ch, in which color-electric interactions between quarks dominate the dynamics. We show that such an intermediate temperature range between the chirally broken and plasma regimes is fully consistent with published screening mass spectra, which demonstrate the breakdown of thermal perturbation theory at the crossover between the partonic and the chiral spin symmetric regime at T_s~(2–3)T_ch. From the known behavior of screening masses with baryon chemical potential, we deduce qualitatively how this chiral spin symmetric band extends into the QCD phase diagram. In the cold and dense region, we propose parity doubled baryons as possible candidates for chiral spin symmetric matter. This represents a special case of quarkyonic matter with confinement and restored chiral symmetry, and can smoothly transform to quark matter at sufficiently high densities. Finally, we discuss the potential of dilepton spectra to identify such matter forms.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: German Research Foundation (DFG); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704

OSTI ID:: 1969918

Report Number(s):: BNL-224230-2023-JAAM

Journal Information:: European Physical Journal. A, Hadrons and Nuclei (Online), Journal Name: European Physical Journal. A, Hadrons and Nuclei (Online) Journal Issue: 12 Vol. 58; ISSN 1434-601X

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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