■ Condensation in Neutron Star Matter with △ Quartet

【摘要】 <正> In the framework of relativistic mean field theory,the condensations of K~- and (?)~0 in neutron star matterincluding baryon octet and Δ quartet are studied.We find that in this case K~- and (?)~0 condensations can occur atrelative shallow optical potential depth of (?) from -80 MeV to -160 MeV.Both K~- and (?)~0 condensations favor theappearances of Δ resonances.With (?) condensations all the Δ quartet can appear well inside the maximum mass stars.The appearances of Δ resonances change the composition and distribution of particles at high densities.The populationsof Δ resonances can enhance K~- condensation.It is found that in the core of massive neutron stars,neutron star matterincludes rich particle species,such as antikaons,baryon octet,and Δ quartet.In the presence of Δ resonances and (?)condensation,the EOS becomes softer and results in smaller maximum mass stars.Furthermore the impact of antikaoncondensations,hyperons,and Δ resonances on direct Urca process with nucleons is also discussed briefly.更多还原

【Abstract】 In the framework of relativistic mean field theory,the condensations of K~- and (?)~0 in neutron star matter including baryon octet and Δ quartet are studied.We find that in this case K~- and (?)~0 condensations can occur at relative shallow optical potential depth of (?) from -80 MeV to -160 MeV.Both K~- and (?)~0 condensations favor the appearances of Δ resonances.With (?) condensations all the Δ quartet can appear well inside the maximum mass stars. The appearances of Δ resonances change the composition and distribution of particles at high densities.The populations of Δ 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 Δ quartet.In the presence of Δ resonances and (?) condensation,the EOS becomes softer and results in smaller maximum mass stars.Furthermore the impact of antikaon condensations,hyperons,and Δ resonances on direct Urca process with nucleons is also discussed briefly.更多还原