Thermodynamics and phase diagrams of Polyakov-loop extended chiral models
We study the thermodynamics and phase diagrams of two-flavor quantum chromodynamics using the Polyakov-loop extended quark-meson (PQM) model and the Pisarski-Skokov chiral matrix (χM) model [1]. At temperatures up to T≈2T[subscript c] and baryon chemical potentials up to μ[subscript B]=400 MeV, bot...
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| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/120997 |
| _version_ | 1826198068029030400 |
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| author | Andersen, Jens O. Folkestad, Aasmund Schiager |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Andersen, Jens O. Folkestad, Aasmund Schiager |
| author_sort | Andersen, Jens O. |
| collection | MIT |
| description | We study the thermodynamics and phase diagrams of two-flavor quantum chromodynamics using the Polyakov-loop extended quark-meson (PQM) model and the Pisarski-Skokov chiral matrix (χM) model [1]. At temperatures up to T≈2T[subscript c] and baryon chemical potentials up to μ[subscript B]=400 MeV, both models show reasonable agreement with the pressure, energy density, and interaction measure as calculated on the lattice. The Polyakov loop is found to rise significantly faster with temperature in models than on the lattice. In the low-temperature and high baryon density regime, the two models predict different states of matter; The PQM model predicts a confined and chirally restored phase, while the χM model predicts a deconfined and chirally restored phase. At finite isospin density and zero baryon density, the onset of pion condensation at T=0 is at μ[subscript I]=1/2m[subscript π], and the transition is second order at all temperatures. The transition temperature for pion condensation coincides with that of the chiral transition for values of the isospin chemical potential larger than approximately 110 MeV. In the χM model, they also coincide with the transition temperature for deconfinement. The results are in good overall agreement with recent lattice simulations of the μ[subscript I]–T phase diagram. |
| first_indexed | 2024-09-23T10:58:21Z |
| format | Article |
| id | mit-1721.1/120997 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:58:21Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1209972022-09-27T16:16:44Z Thermodynamics and phase diagrams of Polyakov-loop extended chiral models Andersen, Jens O. Folkestad, Aasmund Schiager Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Folkestad, Aasmund Schiager We study the thermodynamics and phase diagrams of two-flavor quantum chromodynamics using the Polyakov-loop extended quark-meson (PQM) model and the Pisarski-Skokov chiral matrix (χM) model [1]. At temperatures up to T≈2T[subscript c] and baryon chemical potentials up to μ[subscript B]=400 MeV, both models show reasonable agreement with the pressure, energy density, and interaction measure as calculated on the lattice. The Polyakov loop is found to rise significantly faster with temperature in models than on the lattice. In the low-temperature and high baryon density regime, the two models predict different states of matter; The PQM model predicts a confined and chirally restored phase, while the χM model predicts a deconfined and chirally restored phase. At finite isospin density and zero baryon density, the onset of pion condensation at T=0 is at μ[subscript I]=1/2m[subscript π], and the transition is second order at all temperatures. The transition temperature for pion condensation coincides with that of the chiral transition for values of the isospin chemical potential larger than approximately 110 MeV. In the χM model, they also coincide with the transition temperature for deconfinement. The results are in good overall agreement with recent lattice simulations of the μ[subscript I]–T phase diagram. 2019-03-15T18:57:50Z 2019-03-15T18:57:50Z 2019-03 2018-10 2019-03-11T18:00:15Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/120997 Folkestad, Åsmund, and Jens O. Andersen. “Thermodynamics and Phase Diagrams of Polyakov-Loop Extended Chiral Models.” Physical Review D, vol. 99, no. 5, Mar. 2019. en http://dx.doi.org/10.1103/PhysRevD.99.054006 Physical Review D Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 application/pdf American Physical Society American Physical Society |
| spellingShingle | Andersen, Jens O. Folkestad, Aasmund Schiager Thermodynamics and phase diagrams of Polyakov-loop extended chiral models |
| title | Thermodynamics and phase diagrams of Polyakov-loop extended chiral models |
| title_full | Thermodynamics and phase diagrams of Polyakov-loop extended chiral models |
| title_fullStr | Thermodynamics and phase diagrams of Polyakov-loop extended chiral models |
| title_full_unstemmed | Thermodynamics and phase diagrams of Polyakov-loop extended chiral models |
| title_short | Thermodynamics and phase diagrams of Polyakov-loop extended chiral models |
| title_sort | thermodynamics and phase diagrams of polyakov loop extended chiral models |
| url | http://hdl.handle.net/1721.1/120997 |
| work_keys_str_mv | AT andersenjenso thermodynamicsandphasediagramsofpolyakovloopextendedchiralmodels AT folkestadaasmundschiager thermodynamicsandphasediagramsofpolyakovloopextendedchiralmodels |