We study the effective masses of p-mesons for different charged states in asymmetric nuclear matter （ANM） using the Quantum Hadrodynamics II model. The closed form analytical results are presented for the effective ...We study the effective masses of p-mesons for different charged states in asymmetric nuclear matter （ANM） using the Quantum Hadrodynamics II model. The closed form analytical results are presented for the effective masses of p-mesons. We have shown that the different charged p-mesons have mass splitting similar to various charged pions. The effect of the Dirac sea is also examined, and it is found that this effect is very important and leads to a reduction of the different charged p-meson masses in ANM.展开更多
本文讨论了当前天文观测中中子星最大质量、1.4倍太阳质量中子星半径、潮汐形变以及声速限制等对状态方程的约束.如果3倍饱和密度以上状态方程的多方参数取γ=2.9,同时使用上述四种限制约束的Skyrme相互作用下的核物质参数的均值和偏差...本文讨论了当前天文观测中中子星最大质量、1.4倍太阳质量中子星半径、潮汐形变以及声速限制等对状态方程的约束.如果3倍饱和密度以上状态方程的多方参数取γ=2.9,同时使用上述四种限制约束的Skyrme相互作用下的核物质参数的均值和偏差为:不可压缩模量K_(0)=243.4±22.0 MeV;对称能因子S_(0)=29.3±2.9 MeV;对称能斜率L=74.4±14.8 Me V;同位旋标量有效质量m_(s)^(*)/m=0.79±0.13;有效质量劈裂参数fI=0.08±0.30(中子有效质量小于质子的有效质量).当考虑3倍饱和密度以上状态方程的多方参数取γ=2.45–2.9时,约束出的K_(0)均值增加了11%,S0均值降低了2%,L均值减少了20%,m_(s)^(*)/m均值降低了4%,但是参数f_(I)均值减小了88%.特别是,如果仅利用中子星的质量小于2.05M_(⊙)的数据来进行约束,发现其所需的参数组对应的中子有效质量大于质子有效质量.不同中子星质量区约束出的f_(I)符号的差异表明,未来进一步约束有效的Skyrme相互作用的状态方程的参数还需结合重离子碰撞分析.展开更多
基金Supported by National Nature Science Foundation of China (10775059)
文摘We study the effective masses of p-mesons for different charged states in asymmetric nuclear matter （ANM） using the Quantum Hadrodynamics II model. The closed form analytical results are presented for the effective masses of p-mesons. We have shown that the different charged p-mesons have mass splitting similar to various charged pions. The effect of the Dirac sea is also examined, and it is found that this effect is very important and leads to a reduction of the different charged p-meson masses in ANM.
文摘本文讨论了当前天文观测中中子星最大质量、1.4倍太阳质量中子星半径、潮汐形变以及声速限制等对状态方程的约束.如果3倍饱和密度以上状态方程的多方参数取γ=2.9,同时使用上述四种限制约束的Skyrme相互作用下的核物质参数的均值和偏差为:不可压缩模量K_(0)=243.4±22.0 MeV;对称能因子S_(0)=29.3±2.9 MeV;对称能斜率L=74.4±14.8 Me V;同位旋标量有效质量m_(s)^(*)/m=0.79±0.13;有效质量劈裂参数fI=0.08±0.30(中子有效质量小于质子的有效质量).当考虑3倍饱和密度以上状态方程的多方参数取γ=2.45–2.9时,约束出的K_(0)均值增加了11%,S0均值降低了2%,L均值减少了20%,m_(s)^(*)/m均值降低了4%,但是参数f_(I)均值减小了88%.特别是,如果仅利用中子星的质量小于2.05M_(⊙)的数据来进行约束,发现其所需的参数组对应的中子有效质量大于质子有效质量.不同中子星质量区约束出的f_(I)符号的差异表明,未来进一步约束有效的Skyrme相互作用的状态方程的参数还需结合重离子碰撞分析.
