Phase structure of 2+1-flavour QCD and the magnetic equation of state

• Verfasst von: Gao, Fei [VerfasserIn]
• Verfasst von: Pawlowski, Jan M. [VerfasserIn]
• Titel: Phase structure of 2+1-flavour QCD and the magnetic equation of state
• Verf.angabe: Fei Gao and Jan M. Pawlowski
• E-Jahr: 2021
• Jahr: 1 Dec 2021
• Umfang: 20 S.
• Fussnoten: Gesehen am 27.09.2022
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2021
• Band/Heft Quelle: (2021), Artikel-ID 2112.01395, Seite 1-20
• DOI: doi:10.48550/arXiv.2112.01395
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Lattice
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: High Energy Physics - Theory
• Sach-SW: Nuclear Theory
• K10plus-PPN: 1805515675

Abstract

We determine the chiral phase structure of $2+1$-flavour QCD in dependence of temperature and the light flavour quark mass with Dyson-Schwinger equations. Specifically, we compute the renormalised chiral condensate and its susceptibility. The latter is used to determine the (pseudo)critical temperature for general light current quark masses. In the chiral limit we obtain a critical temperature of about 141\,MeV. This result is in quantitative agreement with recent functional renormalisation group results in QCD, and is compatible with the respective lattice results. We also compute the order parameter potential of the light chiral condensate and map out the regime in the phase diagram which exhibits quasi-massless modes, and discuss the respective chiral dynamics.