Vacuum fluctuation effects on hyperonic neutron star matter

The vacuum fluctuation （VF） effects on the properties of the hyperonic neutron star matter are investigated in the framework of the relativistic mean field （RMF） theory. The VF corrections result in the density dependence of in-medium baryon and meson masses. We compare our results obtained by adopt...

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Published inChinese physics C Vol. 37; no. 12; pp. 43 - 51
Main Author 翁铭华 郭新恒 刘波
Format Journal Article
LanguageEnglish
Published 01.12.2013
Subjects
Couplings
Density
Expansion
Fluctuation
Hyperons
Mesons
Neutron stars
Uncertainty
不确定性
中子星物质
人民群众
波动
物质性质
相对论平均场
真空
超子
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/37/12/125101

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Summary:The vacuum fluctuation （VF） effects on the properties of the hyperonic neutron star matter are investigated in the framework of the relativistic mean field （RMF） theory. The VF corrections result in the density dependence of in-medium baryon and meson masses. We compare our results obtained by adopting three kinds of meson-hyperon couplings. The introduction of both hyperons and VF corrections softens the equation of state （EoS） for the hyperonic neutron star matter and hence reduces hyperonic neutron star masses. The presence of the δ field enlarges the masses and radii of hyperonic neutron stars. Taking into account the uncertainty of meson-hyperon couplings, the obtained maximum masses of hyperonic neutron stars are in the range of 1.33M⊙-1.55M⊙.
Bibliography:equations of state of the neutron star matter, hyperons
The vacuum fluctuation （VF） effects on the properties of the hyperonic neutron star matter are investigated in the framework of the relativistic mean field （RMF） theory. The VF corrections result in the density dependence of in-medium baryon and meson masses. We compare our results obtained by adopting three kinds of meson-hyperon couplings. The introduction of both hyperons and VF corrections softens the equation of state （EoS） for the hyperonic neutron star matter and hence reduces hyperonic neutron star masses. The presence of the δ field enlarges the masses and radii of hyperonic neutron stars. Taking into account the uncertainty of meson-hyperon couplings, the obtained maximum masses of hyperonic neutron stars are in the range of 1.33M⊙-1.55M⊙.
11-5641/O4
WENG Ming-Hua, GUO Xin-Heng,LIU Bo（1 Department of Physics and Electronic Information Engineering, Minjiang University, Fuzhou 350108, China 2 College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China 3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China）
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/37/12/125101