On The Hydrodynamic Initial Conditions Of High Energy Nuclear Collisions

According to Quantum Chromodynamics(QCD),quark-gluon plasma(QGP)can be produced in high energy collisions.The study of the new matter,QGP,is of great importance to our understanding of the origins of the universe and to the deep structure of matter.So large colliders as RHIC and LHC are built.The nucleus with large energy are accelerated to near the speed of light and collides,then QGP will be produced.In order to study the properties of QGP and the physical mechanism that occurs in collisions,different theories and models have been proposed.One of the important models is the hydrodynamic model.All of these models require initial conditions,where the initial energy density is a primary initial physical quantity.In this paper,under the light cone coordinate,the initial energy density is solved by the MV model and the IP-Glasma model,respectively,then the factors affecting the initial energy density and the various amendments are discussed.On the basis of these,the MV model is used to analyze the formation and influence of the convection in odd and even rapidity.Through the analysis of the IP-Glasma model,we use the lattice field theory to find the expression of the initial energy density.The paper is organized as follows:The first chapter mainly expounds the basic knowledge of Quantum Chromodynamics and color glass condensation.,introduce the initial conditon in heavy ion collisions.The second chapter introduces the theory and numerical solution of MV model and IP-Glasma model in detail.In the third chapter,the results of the two models are analyzed in detail.The fourth chapter summarizes the results.