The Energy Loss Of Jet Quenching And Quarks In Holographic Study

The high-energy partons generated by the initial collision of high-energy heavy-ion collision.These partons interact with the medium to induce the gluon radiation when pass through the QGP medium,which leads to the the transverse momentum broadening.This process is called the jet quenching and is also a process of energy loss.Jet quenching is a powerful probe for detecting QGP signals.In addition,the generation of a strong magnetic field was observed in the collision experiment.It has also been found that QGP also has the chemical potential.Therefore,the study of QGP properties in the background of magnetic field and chemical potential is of great significance.Apart from some theoretical developments,it also contributes to the dynamics of QCD.There are many methods to study QGP.This paper adopts another popular method in recent years:Ad S/CFT.Ad S/CFT:there has a correspondence between a type IIB superstring theory in the Ad S₅×S⁵space and a（3+1）dimension in the N=4supersymmetric Yang-Mills gauge field（conformal field theory）.In simple terms,the strongly coupled of conformal field theory can be solved by weak coupling with its corresponding superstring theory.The method of solving the QCD problem using Ad S/CFT is called Ad S/QCD.Ad S/QCD includes hard-wall and soft-wall.In this paper,the soft-wall Ad S/QCD method is mainly used to discuss the effects of magnetic field and chemical potential on energy loss of heavy,light quarks and jet quenching parameter.The effects of magnetic field and chemical potential on jets and energy loss of quarks are mainly numerically analyzed.In this paper mainly calculated drag force,diffusion coefficient,jet quenching parameter,the shoot string energy loss of light quarks.It was find that the quarks move perpendicular to the anisotropic direction loss more energy than when moving along the anisotropic direction;the magnetic field causes anisotropy and enhances the energy loss of the light quark at small distances;the chemical potential is significantly enhanced the energy loss of heavy quark when at high speeds,while light quark energy loss is enhanced at small distances;the effects of magnetic field and chemical potential on energy loss are little at high temperature.These findings have important implications for the study of the nature of QGP.The main structure of this paper is as follows:we introduce QGP and Ad S/CFT in Chapter 1;we study the effects of magnetic field on the energy loss of heavy,light quarks and jet quenching parameter in Chapter 2;we study the effects of chemical potential on the energy loss of heavy,light quarks in Chapter 3;we summarizes the current work in Chapter 4.