The in-medium quark condensate is studied with an equivalent-mass approach in which one does not need to make assumptions on the derivatives of model parameters with respect to the quark current mass.It is shown that ...The in-medium quark condensate is studied with an equivalent-mass approach in which one does not need to make assumptions on the derivatives of model parameters with respect to the quark current mass.It is shown that the condensate is generally a decreasing function of both the density and temperature with the decreasing speed depending on the confinement parameter.Specially,at given density,the condensate decreases on increasing temperature.The decreasing speed is comparatively small at lower temperature,and becomes very fast at higher temperature.展开更多
The study of hadron properties in dense medium created in a relativistic heavy ion collision is a subject of considerable current interest. Of particular importance is the in-medium modification of hadron properties. ...The study of hadron properties in dense medium created in a relativistic heavy ion collision is a subject of considerable current interest. Of particular importance is the in-medium modification of hadron properties. The knowledge is useful for our understanding of both the EOS of nuclear matter and the properties of the dense matter existing in neutron stars. Extending the density dependent relativistic hadron field theory(DDRH) to inclusions of pentaquark (?)+, we write the effective lagrangian density展开更多
Considering the effect of one-gluon-exchange interaction between quarks,the color-flavor locked strange quark matter and strange stars are investigated in a new quark mass density-dependent model.It is found that the ...Considering the effect of one-gluon-exchange interaction between quarks,the color-flavor locked strange quark matter and strange stars are investigated in a new quark mass density-dependent model.It is found that the color-flavor locked strange quark matter can be more stable if the one-gluon-exchange effect is included.The lower density behavior of the sound velocity in this model is different from the previous results.Moreover,the new equation of state leads to a heavier acceptable maximum mass,supporting the recent observation of a compact star mass as large as about 2 times the solar mass.展开更多
基金Supported by National Natural Science Foundation of China under Grant Nos.11045006 and 11135011the Key Project from Chinese Academy of Sciences(12A0A0012)the President Foundation by the Graduate University of Chinese Academy of Sciences
文摘The in-medium quark condensate is studied with an equivalent-mass approach in which one does not need to make assumptions on the derivatives of model parameters with respect to the quark current mass.It is shown that the condensate is generally a decreasing function of both the density and temperature with the decreasing speed depending on the confinement parameter.Specially,at given density,the condensate decreases on increasing temperature.The decreasing speed is comparatively small at lower temperature,and becomes very fast at higher temperature.
基金Supported by the Chinese Academy of Sciences Knowledge Innovation Project （KJCX3-SYW-No2） National Natural Science Foundation of China（1043508010575123）.
基金Supported by Chinese Academy of Sciences Knowledge Innovation Project (KJCX2-SW-No2)National Natural Science Foundation of China(10435080).
文摘The study of hadron properties in dense medium created in a relativistic heavy ion collision is a subject of considerable current interest. Of particular importance is the in-medium modification of hadron properties. The knowledge is useful for our understanding of both the EOS of nuclear matter and the properties of the dense matter existing in neutron stars. Extending the density dependent relativistic hadron field theory(DDRH) to inclusions of pentaquark (?)+, we write the effective lagrangian density
基金support from the National Natural Science Foundation of China (Grant Nos.11135011 and 11045006)the Key Project of Chinese Academy of Sciences (No.Y12A0A0012)
文摘Considering the effect of one-gluon-exchange interaction between quarks,the color-flavor locked strange quark matter and strange stars are investigated in a new quark mass density-dependent model.It is found that the color-flavor locked strange quark matter can be more stable if the one-gluon-exchange effect is included.The lower density behavior of the sound velocity in this model is different from the previous results.Moreover,the new equation of state leads to a heavier acceptable maximum mass,supporting the recent observation of a compact star mass as large as about 2 times the solar mass.
