Influences of Both Δ? and Δ0 Particles on the Neutron Star Cooling
DING Wen-Bo1**, LI Ying1, MI Geng2
1College of Mathematics and Physics, Bohai University, Jinzhou 121000 2College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121000
Abstract：The influences of Δ quartet, especially Δ? and Δ0 particles, on the neutrino scatting and cooling properties of neutron stars are discussed. The results show that Δ quartet can change the density range of direct Urca process of nucleons for muons, as well as the neutrino emissivity and luminosity. The role of Δ on the cooling rates is complicated. It is found that Δ quartet slows the neutron star cooling obviously in hyperonic neutron star matter. However in nuclear matter, Δ can not influence the cooling too much, unless the neutron star is quite massive. The Δ-meson coupling constants can also impact on the results, and the relatively smaller value, the stronger effects of Δ quartet.
. [J]. 中国物理快报, 2012, 29(9): 92601-092601.
DING Wen-Bo, LI Ying, MI Geng. Influences of Both Δ? and Δ0 Particles on the Neutron Star Cooling. Chin. Phys. Lett., 2012, 29(9): 92601-092601.
2012, Vol. 29 
