π介子凝聚对中子星物质的影响

π介子凝聚对中子星物质的影响

王红岩^1,2, 特木尔巴根^1,3, 蒋红梅¹, 刘广洲¹

(1. 吉林大学物理学院, 长春 130021; 2. 北华大学理学院, 吉林省吉林 132013; 3. 内蒙古民族大学物理学院, 内蒙古自治区通辽 028043)

收稿日期:2005-04-19 修回日期:1900-01-01 出版日期:2005-11-26 发布日期:2005-11-26
通讯作者: 刘广洲

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

WANG Hong-yan^1,2, BAO Tmurbagan^1,3, JIANG Hong-mei¹, LIU Guang-zhou¹

(1. College of Physics, Jilin University, Changchun 130021, China; 2. College of Science, Beihua University, Jilin 132013, Jilin Province, China; 3. College of Physics, Inner Mongolia University for Nationalities, Tongliao 028043, Inner Mongolia Autonomous Region, China)

Received:2005-04-19 Revised:1900-01-01 Online:2005-11-26 Published:2005-11-26
Contact: LIU Guang-zhou

摘要/Abstract

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.

关键词: 相对论平均场, Δ共振态, 状态方程, π^-介子凝聚

Abstract: 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 Δ^-’s postponed and the appearance of Δ⁺’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.

Key words: relativistic mean field, delta isobars, equation of state, π^- meson condensate

中图分类号:

O413.3

王红岩, 特木尔巴根, 蒋红梅, 刘广洲. π介子凝聚对中子星物质的影响[J]. J4, 2005, 43(06): 799-802.

WANG Hong-yan, BAO Tmurbagan, JIANG Hong-mei, LIU Guang-zhou. The Influence of π^- Meson Condensation on Neutron Star Matter[J]. J4, 2005, 43(06): 799-802.

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