1Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun 130117 2Center for Theoretical Physics, Jilin University, Changchun 130012 3Department of Physics, Bohai University, Jinzhou 121000 4Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190
Influence of σ* and φ Mesons on Λ Hyperon 1S0 Superfluidity in Neutron Star Matter
1Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun 130117 2Center for Theoretical Physics, Jilin University, Changchun 130012 3Department of Physics, Bohai University, Jinzhou 121000 4Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190
摘要Within the framework of the relativistic mean field theory, we investigate the 1S0 superfluidity (SF) of Λ hyperons in neutron star (NS) matter including σ* and φ mesons. The energy gap of Λ hyperons is calculated with the Nijmegen one−boson-exchange potentials for a ΛΛ pair. The parameter set we use is in line with the recent experimental data ΔBΛΛ∼1.01±0.20+0.18−0.11 MeV. It is found that with σ* and φ mesons the pairing energy gap ΔF of Λ hyperons and the corresponding SF critical temperature TCΛ are suppressed. In addition the NS mass range of Λ hyperon SF is enlarged obviously.
Abstract：Within the framework of the relativistic mean field theory, we investigate the 1S0 superfluidity (SF) of Λ hyperons in neutron star (NS) matter including σ* and φ mesons. The energy gap of Λ hyperons is calculated with the Nijmegen one−boson-exchange potentials for a ΛΛ pair. The parameter set we use is in line with the recent experimental data ΔBΛΛ∼1.01±0.20+0.18−0.11 MeV. It is found that with σ* and φ mesons the pairing energy gap ΔF of Λ hyperons and the corresponding SF critical temperature TCΛ are suppressed. In addition the NS mass range of Λ hyperon SF is enlarged obviously.
2012, Vol. 29 
