Influence Of Jets On Anisotropic Flows In Ultrarelativistic Heavy-ion Collisions By AMPT Model

According to quantum chromodynamics(QCD)theory,nuclear matter will undergo a phase transition from hadron phase to parton phase if the matter is compressed or heated infinitely.High energy heavy-ion collision experiments,as the main experimental means for study this prediction of QCD theory,creates the conditions of extreme high temperature and density for theoretical and experimental research.Thus,the study of relativistic nuclear collision has always been in the forefront of the world.however,due to the tiny volume and short reaction time,it is impossible to directly detect the physical evolution process and material state in the reaction region.Therefore it is necessary to infer the possible physical processes and the properties of the matterial formed from the information carried by the final state particles detected.And in the current researsh,jet quenching and collective flow are the most commonly used tools.The energy lossed by jets,caused by the interaction between the jet and nuclear matter,will not only lead to the change of the structure and energy of jet,but also cause the medium excitation.In order to explore the influence of the media excitation caused by the energy loss of jets on the collective flow.In this paper,we simulate the Pb+Pb collision events of(?)TeV by the sring AMPT model.In the process of simulation,we used jet-trigger technology of HIJING to improve the simulation efficiency.In addition,using the FastJet C++package and based on the jet reconstruction algorithm,the high transverse momentum jet is reconstructed.Then,we selected the dijet events which meet the cut-off conditions to analyse.It is found that the jet asymmetry is mainly caused by the energy loss of the sublead jet,and the energy lossed by jets is carried by the low transverse momentum particles,thus these particles ejected away from the jet axis.Through analyzing the influence of loss energy by jet on the collective,it is found that influence for low transverse momentum particles is weak,while for high transverse momentum particles is significant.Furthermore,through analysis,we found that the energy loss of jets has inapparent influence on the collective flow,but the existence of dijet has a significant effect on the collective flow.