Strong Interaction Effect On Gluon Distribution And Jet Energy Loss With Detailed Balance

In this dissertation,we have analyzed the strong interaction influence of the gluon distribution in the quark-gluon plasma(QGP),and the jet quenching detailed balance effect is studied carefully under the influence.The quark-gluon plasma(QGP)is the new material form on the quark level produced by the high temperature and high density extreme material condition.Jet quenching effect is the important hard probe signal to detect whether the quark-gluon plasma(QGP)is formed.Jet quenching effect means that the partons will lose energy due to multiple scattering when the partons get through the strong interaction medium in the relativistic heavy ion collisions.Meanwhile,the jet quenching also gains energy by absorbing gluons and then forms the detailed balance effect.In the detailed balance effect,the gluons absorbed by the jet quenching are from the quark-gluon plasma(QGP),absorbed by injection of gluons from the quark-gluon plasma.In the previous studies,the gluon distribution was considered as the Bose distribution,which is a kind of particle system distribution that ignores the interaction among particles.Instead the quark-gluon plasma(QGP)is a kind of strong coupled system,the Bose distribution is not applied anymore because of the strong interaction among gluons.We have introduced the basic theory and calculation method of jet quenching under the detailed balance effect.Then the basic physical ideas of non-extensive statistical physics are introduced generally.Owing to the Boltzmann-Gibbs statistics to analyze long-range correlation system lead to singularities and limitations,we use the non-extensive statistics to analyze the gluon distribution in the strong interaction system.In the fourth part,we analyzed the interaction potential energy between gluons,and substituted the interaction potential energy to the rate equation,then solved the equation to get the non-extensive parameter q.And the values that q departures from 1 are calculated to analyze the strong interaction effect.Also we can obtain the gluon distribution in the strong interaction using the non-extensive parameter.Then we found that compared to the ideal Bose gas,more gluons occupy in the low-energy state,and the high-energy state has less number of gluons.With the gluon distribution in the strong interaction,the detailed balance effect of jet quenching was analyzed.We used the opacity expansion method developed by GLV to calculate the jet changed energy at the zeroth and first order by radiating and absorbing gluons.We concluded that for the jet quenching in intermediate transverse momentum area,its absorption energy in strong interaction increases obviously compared to the free Bose gas.But for the one in high energy transverse momentum area,the effect of the gluon absorption is small and the strong interaction influence can be neglected.Finally,we summarized and prospected the work in this dissertation,the result of our work can affect the non-extensive parameter q and the nuclear modification factor in intermediate transverse momentum.Under the influence which we have put forward,the related parameters set by experiment can be modified while considering the strong coupling effect.