Considered the Drell-Yan background in the intermediate invariant mass region,the dilepton production in an expanding hot baryon-rich quark-gluon matter fire-cylinder hasbeen studied based on a previously established ...Considered the Drell-Yan background in the intermediate invariant mass region,the dilepton production in an expanding hot baryon-rich quark-gluon matter fire-cylinder hasbeen studied based on a previously established rclativistic hydrodynamic model. It is foundthat with increasing the rapidity the dilepton yield is strongly suppressed. Such a characteristic, signaling the formation of the baryon-rich quark-gluon matter, can be tested in futureexperiments at Brookhaven and CERN.展开更多
From the full stopping scenario and considered the Drell-Yang background, the rapidity dependence of the dilepton production from the central collision 197Au + 197Au has been studied in the baryon-rich quark-gluon mat...From the full stopping scenario and considered the Drell-Yang background, the rapidity dependence of the dilepton production from the central collision 197Au + 197Au has been studied in the baryon-rich quark-gluon matter by using a relativistic hydrodynamic model.It can be found that the dilepton yield is strongly suppressed as increasing the rapidity. Such a characteristic signaling the formation of the baryon-rich quark-gluon matter can be tested in future experiments at CERN and Brookhaven.展开更多
Besides the state equation there exists another cubic algebraic equation about μf in the form of μf3 + pμf + q = 0, which relates parameters, temperature T, chemical potential μf, and net quark number nff （flavo...Besides the state equation there exists another cubic algebraic equation about μf in the form of μf3 + pμf + q = 0, which relates parameters, temperature T, chemical potential μf, and net quark number nff （flavor f） for a baryon-rich quark-gluon plasma （QGP）. A criterion may be acquired simply according to Cardan formula of the solution of the above equation, which gives naturally a condition: if n << 2πT3/3, one may approximately use the conservation of specific entropy, and then the set of hydrodynamic equation of baryon-rich QGP may be reduced to the set of hydrodynamic equation for baryon-free QGP.展开更多
We examine the interferometry results of identical pion and kaon for the granular sources of quark-gluon plasma droplets for the Au + Au collisions at S_(NN)^(1/2) = 200 GeV.The effects of particle absorptions of pion...We examine the interferometry results of identical pion and kaon for the granular sources of quark-gluon plasma droplets for the Au + Au collisions at S_(NN)^(1/2) = 200 GeV.The effects of particle absorptions of pion and kaon on the results are investigated.We find that the absorptions lead to the decrease of the interferometry radii.After considering the absorptions,the interferometry radii of pion and kaon of the granular sources are in better agreement with the experimental data of the Au + Au collisions.展开更多
We report our recent progress on the QCD phase structure.We explore the properties of quark–gluon matter in the improved Polyakov–Nambu–Jona–Lasinio(PNJL)model by introducing a chemical potential-dependent Polyako...We report our recent progress on the QCD phase structure.We explore the properties of quark–gluon matter in the improved Polyakov–Nambu–Jona–Lasinio(PNJL)model by introducing a chemical potential-dependent Polyakov loop potential.This treatment effectively reflects the quantum backreaction of matter sector to glue sector at nonzero chemical potential.Compared with the original PNJL model,a superiority of the improved PNJL model is that it can effectively describe the confinement–deconfinement transition at low temperature and high density.And the QCD phase diagram will be modified to a certain degree if the strength of the quantum backreaction of matter sector to glue sector is strong.One evident variation is that the region of quarkyonic phase will be greatly reduced in the improved PNJL model.This means that the modification to the Polyakov loop potential with the chemical potential dependence is possibly a significant improvement in exploring the full QCD phase structure.展开更多
Initial values of the quark-gluon plasma system form relativistic nucleusnucleus collisions are discussed under thermodynamic equilibrium.From these initial values,the dependence of the dilepton production on the inci...Initial values of the quark-gluon plasma system form relativistic nucleusnucleus collisions are discussed under thermodynamic equilibrium.From these initial values,the dependence of the dilepton production on the incident energy of colliding nuclei has been studied based on the relativistic hydrodynamic model,and it is found that with increasing incident energy a characterstic plateau indicating the formatioin of the quark-gluon plasma appears in the total yield.展开更多
The production of dileptons from the chemically equilibrating quark gluon plasma in the intermediate mass region has been studied. Comparing with the calculated results based on the thermodynamic equilibrium system of...The production of dileptons from the chemically equilibrating quark gluon plasma in the intermediate mass region has been studied. Comparing with the calculated results based on the thermodynamic equilibrium system of quark gluon plasma, it has been found that the quark phase of the chemically equilibrating system gives rise to an even larger enhancement of the dileptons production. Therefore, such an enhancement of dilepton production may signal the formation of quark gluon plasma.展开更多
文摘Considered the Drell-Yan background in the intermediate invariant mass region,the dilepton production in an expanding hot baryon-rich quark-gluon matter fire-cylinder hasbeen studied based on a previously established rclativistic hydrodynamic model. It is foundthat with increasing the rapidity the dilepton yield is strongly suppressed. Such a characteristic, signaling the formation of the baryon-rich quark-gluon matter, can be tested in futureexperiments at Brookhaven and CERN.
文摘From the full stopping scenario and considered the Drell-Yang background, the rapidity dependence of the dilepton production from the central collision 197Au + 197Au has been studied in the baryon-rich quark-gluon matter by using a relativistic hydrodynamic model.It can be found that the dilepton yield is strongly suppressed as increasing the rapidity. Such a characteristic signaling the formation of the baryon-rich quark-gluon matter can be tested in future experiments at CERN and Brookhaven.
基金the National Natural Science Foundation of China Shanghai Natural Science Foundation under contract!
文摘Besides the state equation there exists another cubic algebraic equation about μf in the form of μf3 + pμf + q = 0, which relates parameters, temperature T, chemical potential μf, and net quark number nff （flavor f） for a baryon-rich quark-gluon plasma （QGP）. A criterion may be acquired simply according to Cardan formula of the solution of the above equation, which gives naturally a condition: if n << 2πT3/3, one may approximately use the conservation of specific entropy, and then the set of hydrodynamic equation of baryon-rich QGP may be reduced to the set of hydrodynamic equation for baryon-free QGP.
基金supported by the National Natural Science Foundation of China(No.11275037)
文摘We examine the interferometry results of identical pion and kaon for the granular sources of quark-gluon plasma droplets for the Au + Au collisions at S_(NN)^(1/2) = 200 GeV.The effects of particle absorptions of pion and kaon on the results are investigated.We find that the absorptions lead to the decrease of the interferometry radii.After considering the absorptions,the interferometry radii of pion and kaon of the granular sources are in better agreement with the experimental data of the Au + Au collisions.
基金supported by the National Natural Science Foundation of China(No.11305121)the Specialized Research Fund for the Doctoral Program of Higher Education(No.20130201120046)+1 种基金the Natural Science Basic Research Plan in Shanxi Province of China(No.2014JQ1012)the Fundamental Research Funds for the Central Universities
文摘We report our recent progress on the QCD phase structure.We explore the properties of quark–gluon matter in the improved Polyakov–Nambu–Jona–Lasinio(PNJL)model by introducing a chemical potential-dependent Polyakov loop potential.This treatment effectively reflects the quantum backreaction of matter sector to glue sector at nonzero chemical potential.Compared with the original PNJL model,a superiority of the improved PNJL model is that it can effectively describe the confinement–deconfinement transition at low temperature and high density.And the QCD phase diagram will be modified to a certain degree if the strength of the quantum backreaction of matter sector to glue sector is strong.One evident variation is that the region of quarkyonic phase will be greatly reduced in the improved PNJL model.This means that the modification to the Polyakov loop potential with the chemical potential dependence is possibly a significant improvement in exploring the full QCD phase structure.
基金Supported by 95 Key Funds of the Chinese Academy of Sciences(KJ951-A1-410)National foundation of China No.19475060
文摘Initial values of the quark-gluon plasma system form relativistic nucleusnucleus collisions are discussed under thermodynamic equilibrium.From these initial values,the dependence of the dilepton production on the incident energy of colliding nuclei has been studied based on the relativistic hydrodynamic model,and it is found that with increasing incident energy a characterstic plateau indicating the formatioin of the quark-gluon plasma appears in the total yield.
基金Supported in part by 95' Key Funds of the Chinese Academy of Sciences (KJ951-A1-410) by the National Nature Science Foundati
文摘The production of dileptons from the chemically equilibrating quark gluon plasma in the intermediate mass region has been studied. Comparing with the calculated results based on the thermodynamic equilibrium system of quark gluon plasma, it has been found that the quark phase of the chemically equilibrating system gives rise to an even larger enhancement of the dileptons production. Therefore, such an enhancement of dilepton production may signal the formation of quark gluon plasma.
