From the full stopping scenario,a relativistic hydrodynamic model describing the evolution of the baryon-rich quark-gluon matter fire-cylinder has been established.Based on it,the rapidity Distribution of dileptons wi...From the full stopping scenario,a relativistic hydrodynamic model describing the evolution of the baryon-rich quark-gluon matter fire-cylinder has been established.Based on it,the rapidity Distribution of dileptons with intermediate invariant masses has been studied.It is found that the quark phase gives the dominant contribution to the dilepton spectrum due to the influence of the phase boundary on the evolution of the system,especially the dilepton yield is strongly suppressed with the increasing rapidity.展开更多
The gap equation for the fermion in the gauged Nambu-Jona-Lasinio(NJL)model is derived in nuclear medium with flavors Nf=2.Based on the gap equation,the fermion mass in nuclear medium is obtained and used to determine...The gap equation for the fermion in the gauged Nambu-Jona-Lasinio(NJL)model is derived in nuclear medium with flavors Nf=2.Based on the gap equation,the fermion mass in nuclear medium is obtained and used to determine the properties of the scalar and pseudoscalar mesons.In contrast to the NJL model,the gluonic part has the one-fourth contribution to the fermion mass.The critical density with the chiral symmetry restored is about 6ρ0.展开更多
In the study of dilepton production of a baryon-rich quark-gluon fireball based on the full stopping scenario via a relativistic hydrodynamic model,it is found that for the fixed initial baryon chemical potential with...In the study of dilepton production of a baryon-rich quark-gluon fireball based on the full stopping scenario via a relativistic hydrodynamic model,it is found that for the fixed initial baryon chemical potential with increasing initial temperature a peak indicating the formation of the baryon-rich quark-gluon matter appears in the total dilepton yield.展开更多
From the full stopping scenario,the dilepton production in the baryon-rich quark-gluon fireball based on a relativistic hydrodynamic model is studied,and it is found that with increasing incident energy a characterist...From the full stopping scenario,the dilepton production in the baryon-rich quark-gluon fireball based on a relativistic hydrodynamic model is studied,and it is found that with increasing incident energy a characteristic plateau indicating the formation of the baryon-rich quark-gluon matter appears in the total yield.展开更多
A relativistic density-dependent Hartree approach in the chiral-symmetry-breaking field model has been developed for nuclear matter.The coupling constants of the relativistic Hartree-Lagrangian are made density depend...A relativistic density-dependent Hartree approach in the chiral-symmetry-breaking field model has been developed for nuclear matter.The coupling constants of the relativistic Hartree-Lagrangian are made density dependence and obtained from the relativistic Brueckner-Bethe-Goldstone results of nuclear matter.The calculated saturation nuclear density,binding-energy and compressibility for nuclear matter are close to the empirical ones.展开更多
基金Supported by the 95'Key Project Funds of the Chinese Academy of Sciences under Grant No.KJ 951-A1-410.
文摘From the full stopping scenario,a relativistic hydrodynamic model describing the evolution of the baryon-rich quark-gluon matter fire-cylinder has been established.Based on it,the rapidity Distribution of dileptons with intermediate invariant masses has been studied.It is found that the quark phase gives the dominant contribution to the dilepton spectrum due to the influence of the phase boundary on the evolution of the system,especially the dilepton yield is strongly suppressed with the increasing rapidity.
文摘The gap equation for the fermion in the gauged Nambu-Jona-Lasinio(NJL)model is derived in nuclear medium with flavors Nf=2.Based on the gap equation,the fermion mass in nuclear medium is obtained and used to determine the properties of the scalar and pseudoscalar mesons.In contrast to the NJL model,the gluonic part has the one-fourth contribution to the fermion mass.The critical density with the chiral symmetry restored is about 6ρ0.
基金Supported in part by the Grant LWTZ-1298 of Chinese Academy of Sciencesthe National Natural Science Foundation of China.
文摘In the study of dilepton production of a baryon-rich quark-gluon fireball based on the full stopping scenario via a relativistic hydrodynamic model,it is found that for the fixed initial baryon chemical potential with increasing initial temperature a peak indicating the formation of the baryon-rich quark-gluon matter appears in the total dilepton yield.
基金Supported by the National Natural Science Foundation of China under Grant No.19475060.
文摘From the full stopping scenario,the dilepton production in the baryon-rich quark-gluon fireball based on a relativistic hydrodynamic model is studied,and it is found that with increasing incident energy a characteristic plateau indicating the formation of the baryon-rich quark-gluon matter appears in the total yield.
基金Supported in part by the National Natural Science Foundation of Chinaby the Grant LWTZ of Chinese Academy of Sciences。
文摘A relativistic density-dependent Hartree approach in the chiral-symmetry-breaking field model has been developed for nuclear matter.The coupling constants of the relativistic Hartree-Lagrangian are made density dependence and obtained from the relativistic Brueckner-Bethe-Goldstone results of nuclear matter.The calculated saturation nuclear density,binding-energy and compressibility for nuclear matter are close to the empirical ones.
