η string formation in QCD chiral phase transition  

作　　者：徐晓梅 傅永平 李云德 

机构地区：[1]Physics Department,Yunnan Normal University [2]Physics Department,Yunnan University

出　　处：《Chinese Physics C》2010年第4期444-447,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10347011,10665003)

摘　　要：In the paper we discuss the role of the axial U（1）A symmetry in the chiral phase transition using the U（Nf）R × U（Nf）L linear sigma model with two massless quark flavors. It is expected that above a certain temperature the axial U（1）A symmetry will be restored. A string-like static solution, the η string can be formed and detected in the ultrarelativistic heavy-ion collision process.In the paper we discuss the role of the axial U（1）A symmetry in the chiral phase transition using the U（Nf）R × U（Nf）L linear sigma model with two massless quark flavors. It is expected that above a certain temperature the axial U（1）A symmetry will be restored. A string-like static solution, the η string can be formed and detected in the ultrarelativistic heavy-ion collision process.

关 键 词：η string sigma model chiral phase transition 

分 类 号：O572.243[理学—粒子物理与原子核物理]