Neutron Star Matter Including Delta Isobars

In this paper a new phase structure of neutron star matter including nucleons and delta isobars is presented.Particle fractions populated and pion condensations in neutron star matter are investigated in this model. The existence of the pion condensations can postpone the appearance of delta isobars. We found that both the pion condensation and reduce of the ratio of delta isobar to nucleons couplings can soften the corresponding equation of state. The maximum masses and their corresponding radii of neutron stars are calculated, and the obtained values are in observational region.

作 者： LIU Guang-Zhou LIU Wei ZHAO En-Guang   作者單位： LIU Guang-Zhou(Center for Theoretical Physics and Department of Physics, Jilin University, Changchun 130023, China;Institute of Theoretical Physics, Academia Sinica, P.O. Box 2735, Beijing 100080, China)

LIU Wei(Center for Theoretical Physics and Department of Physics, Jilin University, Changchun 130023, China)

ZHAO En-Guang(Institute of Theoretical Physics, Academia Sinica, P.O. Box 2735, Beijing 100080, China) 

刊 名： 理論物理通訊(英文版)  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2004 42(7)  分類號：   關鍵詞： neutron star matter   relativistic mean field   equation of state   pion condensation  

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