Phase diagram of helically imbalanced QCD matter
| Autor: | Maxim Chernodub, Victor E Ambrus |
|---|---|
| Přispěvatelé: | Institut Denis Poisson (IDP), Centre National de la Recherche Scientifique (CNRS)-Université de Tours (UT)-Université d'Orléans (UO), Pacific Quantum Center [Vladivostok], Far Eastern Federal University (FEFU), Departament de fizică = Department of Physics [Timișoara], West University of Timișoara [Roumanie] (WUT), M.N.C. is partially supported by Grant No.0657-2020-0015 of the Ministry of Science and Higher Education of Russia., V.E.A. is supported by a Grant from the Romanian National Authority for Scientific Research and Innovation, CNCS-UEFISCDI, project number PN-III-P1-1.1-PD-2016-1423., Centre National de la Recherche Scientifique (CNRS)-Université de Tours-Université d'Orléans (UO) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
High Energy Physics - Theory
2575Nq PACS : 12.38.Aw 25.75.Nq 12.38.Mh [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] Nuclear Theory 010308 nuclear & particles physics [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th] High Energy Physics::Lattice High Energy Physics::Phenomenology 1238Mh FOS: Physical sciences 01 natural sciences numbers: 1238Aw Nuclear Theory (nucl-th) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] 0103 physical sciences [PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el] 010306 general physics |
| Zdroj: | Physical Review Physical Review D Physical Review D, American Physical Society, 2021, 103, pp.094015. ⟨10.1103/PhysRevD.103.094015⟩ |
| ISSN: | 1550-7998 1550-2368 |
| DOI: | 10.1103/PhysRevD.103.094015⟩ |
| Popis: | We discuss the influence of a helicity imbalance on the phase diagram of dense QCD at finite temperature. We argue that the helical chemical potential is a thermodynamically relevant quantity in theories with the mass gap generation. Using the linear sigma model coupled to quarks, we show that the presence of the helical density substantially affects the phase diagram of dense quark matter. A moderate helical density makes the chiral phase transition softer while shifting the critical endpoint towards lower temperatures and higher baryon chemical potentials. As the helical density increases, the segment of the first-order transition disappears, and the chiral transition becomes a soft crossover. At even higher helical chemical potentials, the first-order transition reappears again at the zero-density finite-temperature transition and extends into the interior of the phase diagram. This evolution of the chiral transition reflects the existence of a thermodynamic duality between helical and vector (baryonic) chemical potentials. We also show that the presence of the helicity imbalance of quark matter increases the curvature of the chiral pseudocritical line in QCD. 15 pages, 6 figures |
| Databáze: | OpenAIRE |
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