π介子凝聚对中子星物质的影响  

The Influence of π^- Meson Condensation on Neutron Star Matter

作　　者：王红岩[1] 特木尔巴根[1] 蒋红梅[1] 刘广洲[1] 

机构地区：[1]吉林大学物理学院

出　　处：《吉林大学学报（理学版）》2005年第6期799-802,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:10275029)

摘　　要：在相对论平均场理论框架下研究了π-介子凝聚对包括Δ共振态的中子星物质状态方程及其粒子分布的影响.研究表明,π-介子凝聚的存在对中子星物质的粒子分布有明显影响,使Δ-粒子出现推迟,Δ+粒子出现提前.π-介子凝聚的出现还使中子星物质的状态方程变软.尽管这种改变很小,但这种变软的趋势仍具有重要的意义.In the theoretical framework of the relativistic mean field, the influences of π^- meson condensate on the equation of state and the particle fractions of neutron star matter including delta isobars are studied. The numerical analysis shows that the existence of π^- meson condensate has an obvious influence on the particle fractions of neutron star matter. It makes the appearance of △^- s postponed and the appearance of △^- s advanced, π^- meson condensate influences weakly the equation of state of neutron star matter and it can soften the equation of state slightly. However, the tendency to make the equation of state soften is of importance.

关 键 词：相对论平均场 △共振态 状态方程 π^-介子凝聚 

分 类 号：O413.3[理学—理论物理]