Influences of Both Δ^(−) and Δ^(0) Particles on the Neutron Star Cooling  

作　　者：DING Wen-Bo LI Ying MI Geng 丁文波;李颖;密更(College of Mathematics and Physics,Bohai University,Jinzhou 121000;College of Chemistry,Chemical Engineering and Food Safety,Bohai University,Jinzhou 121000)

机构地区：[1]College of Mathematics and Physics,Bohai University,Jinzhou 121000 [2]College of Chemistry,Chemical Engineering and Food Safety,Bohai University,Jinzhou 121000

出　　处：《Chinese Physics Letters》2012年第9期45-48,共4页中国物理快报（英文版）

摘　　要：The influences ofΔquartet,especially Δ^(−)and Δ^(0) particles,on the neutrino scatting and cooling properties of neutron stars are discussed.The results show thatΔquartet can change the density range of direct Urca process of nucleons for muons,as well as the neutrino emissivity and luminosity.The role ofΔon the cooling rates is complicated.It is found thatΔquartet slows the neutron star cooling obviously in hyperonic neutron star matter.However in nuclear matter,Δcan not influence the cooling too much,unless the neutron star is quite massive.TheΔ-meson coupling constants can also impact on the results,and the relatively smaller value,the stronger effects ofΔquartet.

关 键 词：CONSTANTS MESON 

分 类 号：O57[理学—粒子物理与原子核物理]