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 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 1.33MΘ-1.55MΘ.
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WENG Ming-Hua, GUO Xin-Heng and LIU Bo. Vacuum fluctuation effects on hyperonic neutron star matter[J]. Chinese Physics C, 2013, 37(12): 125101. doi: 10.1088/1674-1137/37/12/125101
WENG Ming-Hua, GUO Xin-Heng and LIU Bo. Vacuum fluctuation effects on hyperonic neutron star matter[J]. Chinese Physics C, 2013, 37(12): 125101.  doi: 10.1088/1674-1137/37/12/125101 shu
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Received: 2013-02-27
Revised: 2013-07-16
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Vacuum fluctuation effects on hyperonic neutron star matter

    Corresponding author: WENG Ming-Hua,
    Corresponding author: GUO Xin-Heng,
    Corresponding author: LIU Bo,

Abstract: 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 1.33MΘ-1.55MΘ.

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