In the framework of relativistic quantum hadron dynamical theory,under semiclassical approximation and taking the vacuum fluctuation into account,a relativistic Vlasov equation(RVE)has been derived.Using RVE and consi...In the framework of relativistic quantum hadron dynamical theory,under semiclassical approximation and taking the vacuum fluctuation into account,a relativistic Vlasov equation(RVE)has been derived.Using RVE and considering other relativistic effects,we have studied the isovector dipole giant resonances built on ground state in spherical nuclei.The main results shown that the resonance energies for each multipole are larger than those obtained from the non-relativistic classical Vlasov approach.But by means of choosing a reasonable symmetry potential as 100MeV,the relativistic results can fit the experimental results very well.展开更多
Considering the influence of latent heat,the photon spectra from the quark-gluon plasma(QGP)and from the hadronic background are calculated.A Ufull stopping scenario79 which assumes a sphericaJ nuclear fireball expand...Considering the influence of latent heat,the photon spectra from the quark-gluon plasma(QGP)and from the hadronic background are calculated.A Ufull stopping scenario79 which assumes a sphericaJ nuclear fireball expanding in a 3+1 dimensional framework is addressed to solve the relativistic hydrodynamic equations.Our results show that at large transverse momenta,say pT≥4-5 GeV/cf one may probably expect to distinguish the photons originating in QGP from in the hadronic background・According to the measured total spectrum authors pose a graphical method to diagnose if QGP exists.展开更多
基金Supported in part by the National Nature Science Foundation of China under Contract No.19275058the Grant LWTZ-1298 of Chincsc Academy of Science.
文摘In the framework of relativistic quantum hadron dynamical theory,under semiclassical approximation and taking the vacuum fluctuation into account,a relativistic Vlasov equation(RVE)has been derived.Using RVE and considering other relativistic effects,we have studied the isovector dipole giant resonances built on ground state in spherical nuclei.The main results shown that the resonance energies for each multipole are larger than those obtained from the non-relativistic classical Vlasov approach.But by means of choosing a reasonable symmetry potential as 100MeV,the relativistic results can fit the experimental results very well.
基金Supported by the Grant LWTZ-1298 of Chinese Academy of Sciencesupported in part by the National Natural Science Foundation of China.
文摘Considering the influence of latent heat,the photon spectra from the quark-gluon plasma(QGP)and from the hadronic background are calculated.A Ufull stopping scenario79 which assumes a sphericaJ nuclear fireball expanding in a 3+1 dimensional framework is addressed to solve the relativistic hydrodynamic equations.Our results show that at large transverse momenta,say pT≥4-5 GeV/cf one may probably expect to distinguish the photons originating in QGP from in the hadronic background・According to the measured total spectrum authors pose a graphical method to diagnose if QGP exists.
