Bound states, such as qq and q^-q, may exist the volume of the bound states may evoke a reduction in investigate qualitatively the volume effect on the properties states start to be completely melted.
We study the dissociation of strictly confined charmonium states at finite temperature.The strict confinement constraint to the Cornell potential leads to a 10%higher J/(φ)dissociation temperature and in turn a weake...We study the dissociation of strictly confined charmonium states at finite temperature.The strict confinement constraint to the Cornell potential leads to a 10%higher J/(φ)dissociation temperature and in turn a weaker J/(φ)suppression in relativistic heavy ion collisions.展开更多
Sigma decay and its relation with chiral phase transition are discussed at finite temperature and density in the framework of the Nambu-Jona-Lasinio model.The decay rate for the processσ→2πto first order in 1/Nc(in...Sigma decay and its relation with chiral phase transition are discussed at finite temperature and density in the framework of the Nambu-Jona-Lasinio model.The decay rate for the processσ→2πto first order in 1/Nc(inverse number of colors)expansion is calculated as a function of temperature T and baryon density nb.In particular,only when the chiral phase transition happens around the tricritical point,theσdecay results in a non-thermal enhancement of pions in the final state distributions in relativistic heavy ion collisions.展开更多
For a Ф^(4)-theory the equal-time transport theory is derived with a collision term by including 4-point correlations.Within aћexpansion a set of coupled equations is presented for the first three energy moments of t...For a Ф^(4)-theory the equal-time transport theory is derived with a collision term by including 4-point correlations.Within aћexpansion a set of coupled equations is presented for the first three energy moments of the Wigner functions and the 4-point correlations.The presence of 4-point correlations.The limit n→0 is discussed.describing the collision term leads already in this limit to particles with width.展开更多
A system with disoriented chiral condensates(DCCs)is considered in the presence of residual thermal pion distributions.By self-consistently solving the coupled equations for the condensates,the thermal pion distributi...A system with disoriented chiral condensates(DCCs)is considered in the presence of residual thermal pion distributions.By self-consistently solving the coupled equations for the condensates,the thermal pion distributions,and the self-energies,it is observed that the neutral pion fraction f as a signal of DCCs is erased by the thermal pions.展开更多
基金The project supported in part by National Natural Science Foundation of China under Grant Nos. 90103019 and 10428510.We thank professor Yu-Xin Liu for useful discussions,
文摘Bound states, such as qq and q^-q, may exist the volume of the bound states may evoke a reduction in investigate qualitatively the volume effect on the properties states start to be completely melted.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10847001,10975084 and 11079024.
文摘We study the dissociation of strictly confined charmonium states at finite temperature.The strict confinement constraint to the Cornell potential leads to a 10%higher J/(φ)dissociation temperature and in turn a weaker J/(φ)suppression in relativistic heavy ion collisions.
基金Supported in part by the National Natural Science Foundation of China under Grant Nos.19845001 and 19925519by the Major State Basic Research Development Program under Contract No.G2000077407.
文摘Sigma decay and its relation with chiral phase transition are discussed at finite temperature and density in the framework of the Nambu-Jona-Lasinio model.The decay rate for the processσ→2πto first order in 1/Nc(inverse number of colors)expansion is calculated as a function of temperature T and baryon density nb.In particular,only when the chiral phase transition happens around the tricritical point,theσdecay results in a non-thermal enhancement of pions in the final state distributions in relativistic heavy ion collisions.
基金Supported in part by the National Natural Science Foundation of China under Grant No.19845001the CAO Guang-biao Foundation of Tsinghua University.
文摘For a Ф^(4)-theory the equal-time transport theory is derived with a collision term by including 4-point correlations.Within aћexpansion a set of coupled equations is presented for the first three energy moments of the Wigner functions and the 4-point correlations.The presence of 4-point correlations.The limit n→0 is discussed.describing the collision term leads already in this limit to particles with width.
基金Supported by the National Natural Science Foundation of China under Grant No.19845001the Science Foundation of State Commission of Education of Chinathe Cao Guang-biao Foundation of Tsinghua University。
文摘A system with disoriented chiral condensates(DCCs)is considered in the presence of residual thermal pion distributions.By self-consistently solving the coupled equations for the condensates,the thermal pion distributions,and the self-energies,it is observed that the neutral pion fraction f as a signal of DCCs is erased by the thermal pions.
