QCD equation of state and the structure of up-down quark stars in NJL model
Chiral and pion superfluidity phase transitions are studied within NJL model. The model parameters are fitted by pion mass and decay constant together with recent isospin density from lattice QCD. Dense and cold QCD matter suffered the first order chiral phase transition during the quark chemical po...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321321002376 |
| _version_ | 1818689902416494592 |
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| author | Shu-Sheng Xu |
| author_facet | Shu-Sheng Xu |
| author_sort | Shu-Sheng Xu |
| collection | DOAJ |
| description | Chiral and pion superfluidity phase transitions are studied within NJL model. The model parameters are fitted by pion mass and decay constant together with recent isospin density from lattice QCD. Dense and cold QCD matter suffered the first order chiral phase transition during the quark chemical potential increase. Based on the studies of phase structures, the equation of states (EoS) of dense QCD matter is calculated with the conditions of β equilibrium and electric charge neutrality. Take the EoS as input, the mass-radius relation of up-down quark stars is predicted, which is consistent with recent observations of heaviest mass and radius of 1.4M⊙. |
| first_indexed | 2024-12-17T12:17:29Z |
| format | Article |
| id | doaj.art-ff45be124ed74043baa2a8b4edc1b6e6 |
| institution | Directory Open Access Journal |
| issn | 0550-3213 |
| language | English |
| last_indexed | 2024-12-17T12:17:29Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-ff45be124ed74043baa2a8b4edc1b6e62022-12-21T21:49:07ZengElsevierNuclear Physics B0550-32132021-10-01971115540QCD equation of state and the structure of up-down quark stars in NJL modelShu-Sheng Xu0School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaChiral and pion superfluidity phase transitions are studied within NJL model. The model parameters are fitted by pion mass and decay constant together with recent isospin density from lattice QCD. Dense and cold QCD matter suffered the first order chiral phase transition during the quark chemical potential increase. Based on the studies of phase structures, the equation of states (EoS) of dense QCD matter is calculated with the conditions of β equilibrium and electric charge neutrality. Take the EoS as input, the mass-radius relation of up-down quark stars is predicted, which is consistent with recent observations of heaviest mass and radius of 1.4M⊙.http://www.sciencedirect.com/science/article/pii/S0550321321002376 |
| spellingShingle | Shu-Sheng Xu QCD equation of state and the structure of up-down quark stars in NJL model Nuclear Physics B |
| title | QCD equation of state and the structure of up-down quark stars in NJL model |
| title_full | QCD equation of state and the structure of up-down quark stars in NJL model |
| title_fullStr | QCD equation of state and the structure of up-down quark stars in NJL model |
| title_full_unstemmed | QCD equation of state and the structure of up-down quark stars in NJL model |
| title_short | QCD equation of state and the structure of up-down quark stars in NJL model |
| title_sort | qcd equation of state and the structure of up down quark stars in njl model |
| url | http://www.sciencedirect.com/science/article/pii/S0550321321002376 |
| work_keys_str_mv | AT shushengxu qcdequationofstateandthestructureofupdownquarkstarsinnjlmodel |