Correlation Of Anisotropic Flows In High Energy Heavy-Ion Collisions From AMPT Model

High-energy heavy-ion collision physics began to emerge in the late 1970s and early1980s.With the continuous improvement of experimental conditions and the rapid development of computer technology,it has become an important research direction in modern physics.The so-called"high energy"refers to the energy is particularly high,and the"heavy ion"refers to the atomic nucleus,which accelerates the two nucleus to near the speed of light,and the substance formed after the collision is the object of high energy heavy ion collision physics research.At present,the two most energetic accelerators in the world,RHIC and LHC,have confirmed the existence of a new material form,the quark gluon plasma(QGP).In theory,this material has been predicted by quantum chromodynamics(QCD).The discovery of the quark gluon plasma brought the dawn of the establishment of the phase diagram of the nuclear material,so RHIC carried out the first phase of the beam energy scanning experiment(BES-I),and the energy range covereds (?)-7.7~200GeV.The experiment confirmed that the QCD phase transition critical point and the first-order phase transition boundary are below (?)-2 0 GeV,and it is planned to start the second phase of beam energy scanning experiment(BES-II)in 2019.In theory,people mainly conduct related research through models.This paper uses the AMPT model,which is a multiphase transport model.There are more than one method for studying high-energy heavy ion collisions.Collective flow is a very important and observable measurement.It has a direct response to the early nature of the collision system,and QGP is generated in the early stage of system evolution.It can be said that collective The stream may contain direct information about QGP.In this paper,the?-sub event plane method is used in the calculation of the collective flow.This method corrects the magnitude of the collective flow value more accurately.First of all,this paper divides the centrality of the event and calculates the resolution of the reaction plane.Then the elliptic flow and the triangular flow are studied separately.The variation of the two collective flows with the transverse momentum and with the centrality are given.The ratio of the differential flow and the integral flow are given.The results were systematically analyzed.Finally,this paper studies the relationship between elliptic flow and triangular flow.First,it finds the signs that the elliptic flow is associated with the triangular flow.Secondly,it determines the relationship between the two.Thirdly,it measures the degree of association.Finally,the results were analyzed.