Deconfinement phase transition in neutron star matter |
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| Authors: | LI Ang PENG Guang-Xiong Lombardo U |
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| Institution: | Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University;Dipartimento di Fisica e Astronomia, Catania University;China Center of Advanced Science and Technology (World Laboratory);Institute of High Energy Physics, Chinese Academy of Sciences;Phys. Depart. of Graduate University, Chinese Academy of Sciences;Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare |
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| Abstract: | The transition from hadron phase to strange quark phase in dense matter is investigated. Instead of using the conventional bag model in quark sect, we achieve the confinement by a density-dependent quark mass derived from in-medium chiral condensates, with a thermodynamic problem improved. In nuclear slot,we adopt the equation of state from Brueckner-Bethe-Goldstone approach with three-body force. It is found that the mixed phase can occur, for reasonable confinement parameter, near the normal saturation density,and transit to pure quark matter at 4-5 times the saturation, which is quite different from the previous results from other quark models that pure quark phase can not appear at neutron-star densities. |
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| Keywords: | phase transition the density-dependent quark model three-body force |
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