Topological String in Quantum-Chromodynamical Chiral Phase Transitions

作     者：李云德 

作者机构：DepartmentofPhysicsYunnanUniversityKunming650091 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2005年第22卷第5期

页      面：1300-1302页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0702[理学-物理学] 

基　　金：国家自然科学基金 

主　　题：Heavy ions 

摘      要：It is pointed out that if in heavy ion collision processes, the quark–gluon plasma SU(2) chiral phase transition really takes place and the phase transition is a second order. Then the topological string, i.e., the π string, will be formed. The main effect of this phenomenon is that there will be a number of pions produced by decay of the π string in the final state. The pions from the decay of the π string lead to the same effect of decreasing the Hanbury–Brown–Twiss peak in two-pion spectra which is just as that of the long-lived hadronic resonances. At relativistic heavy-ion collision and large hadron collision energies, it is expected that the factors are about α~0.7−0.9 and α~0.6−0.85, respectively.