HBT Radii And Transveres Momentum Relationship In RHIC Scanning Energy

The central goal of high energy heavy ion collision is to study the extremely high temperature and high energy density new nuclear matter-quark gluon plasma (QGP). The information of space-time geometry structure and dynamics of particle-emitting source is the important prerequisite in analyzing the QGP relevant signals. Femtoscopic, also called Hanbury-Brown Twiss (HBT) effects, it basis of identical principal in quantum mechanical. Use the HBT interferometry not only can get the spacetime and dynamiacl information of the emitting source, it also sensitive to the properties of the partonic stage which can reflect the phase transformation from parton stage to hardon stage. So the HBT interferometry is an important tool to study the space-time feature of particle-emitting source, and is an effective method to examine the quantum chromdynamics (QCD) phase transition. This is thus the subject of my article.In this article, I use Relativistic Quantum Molecular Dynamics model (RQMD) to simulate the Relativistic Heavy Ion Collider (RHIC) scanning energy 2πspace-time interferometry and the transverse momentum dependence of HBT radii. We first study the Equation of State (EoS) ?Soft'and ?Hard', we can see in high energy the effective of meanfiled can be ignored. There is many ways to produce the pions, in this article we focus on the pions produced in direct collision, decay and string fragment. We find that the pion source produced in direct collision is the smallest, it is because the pions produced in direct collision carry more initial information about the collision source. Other ways produce pions carry more evolution information, so the HBT radii become larger. At last we analysis the freeze-out volume in RHIC scanning energy.