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■ Condensation in Neutron Star Matter with △ Quartet

■ Condensation in Neutron Star Matter with △ Quartet
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摘要 In the framework of relativistic mean field theory, the condensations of K^- and K^0 in neutron star matter including baryon octet and △ quartet are studied. We find that in this case K^- and K^0 condensations can occur at relative shallow optical potential depth of K^ from -80 MeV to -160 MeV. Both K^- and K^0 condensations favor the appearances of △ resonances. With K^- condensations all the △ quartet can appear well inside the maximum mass stars. The appearances of △ resonances change the composition and distribution of particles at high densities. The populations of △ resonances can enhance K^- condensation. It is found that in the core of massive neutron stars, neutron star matter includes rich particle species, such as antikaons, baryon octet, and △ quartet. In the presence of △ resonances and K^- condensation, the EOS becomes softer and results in smaller maximum mass stars. Furthermore the impact of antikaon condensations, hyperons, and △ resonances on direct Urca process with nucleons is also discussed briefly.
出处 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第9期500-508,共9页 理论物理通讯(英文版)
基金 Supported in part by National Natural Science Foundation of China under Grant Nos.10275029 and 10675054
关键词 antikaon condensation neutron stars delta resonances 中子星物质 相对论平均场理论 凝聚 最大质量 共振能 颗粒分布 缩合 高密度
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