Deconfinement phase transition in neutron star matter

LI Ang; PENG Guang-Xiong; Lombardo U

doi:10.1088/1674-1137/33/S1/020

Chinese Physics C> 2009, Vol. 33> Issue(S1) : 61-63 DOI: 10.1088/1674-1137/33/S1/020

Deconfinement phase transition in neutron star matter

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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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LI Ang, PENG Guang-Xiong and Lombardo U. Deconfinement phase transition in neutron star matter[J]. Chinese Physics C, 2009, 33(S1): 61-63. doi: 10.1088/1674-1137/33/S1/020

LI Ang, PENG Guang-Xiong and Lombardo U. Deconfinement phase transition in neutron star matter[J]. Chinese Physics C, 2009, 33(S1): 61-63. doi: 10.1088/1674-1137/33/S1/020 shu

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Received: 2008-10-22
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Deconfinement phase transition in neutron star matter

Corresponding author: LI Ang,

Received Date: 2008-10-22

Accepted Date: 1900-01-01

Available Online: 2009-01-10

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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Deconfinement phase transition in neutron star matter

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