Analysis Of The Back-to-back Correlation Between The Mechanism Of Hadronization And Frozen Particles In High-energy Heavy Ion Collisions

Quark gluon plasma?QGP?is a new form of matter predicted lattice QCD.It is believed by physicists that QGP may exist in the short period after high energy heavy ion collision and at the time of early universe.In terms of the current experimental accuracy,QGP can not be directly measured.The last state particles can be observed in the experiment.We can only rely on various phenomenological models to deduce the intermediate process after collision.In the high temperature and high density media system formed by high energy heavy ion collisions,QCD predicts that the QGP would undergo phase transition,i.e.hadronization,with the expansion of the dense system source.After hadronization,the interaction between particles and media system can be compressed into quasi particles by using Bogoliubov transform.The quasi particle mass is different from the free particle mass received by the detector,so the back-to-back correlation between the two particles can be generated.In this paper,we use the effective mass of the quasi particle model as a variable to analyze the k meson back-to-back correlation function.With the expansion and evolution of high-temperature and high-density media system,The collisional analysis source has four different temperature stages:quark gluon plasma state,complete chemical equilibrium,partial chemical equilibrium and thermal equilibrium,partial chemical equilibrium and thermal equilibrium,in which there are two phases,namely,quark gluon plasma phase transition and hadronization phase transition when particles freeze out.There are still controversies in the model of freeze-out temperature When choose the different hadronization phase transition.According to the four different temperature values given in theory and experiment,the k meson back-to-back correlation function is analyzed,which provides an ideal model for studying the evolution information of the media system and exploring the existence of quark gluon plasma.Finally,the partial chemical equilibrium model marked by the freeze-out temperatureT_pch?28?140Me Vis an ideal particle freeze-out model.