转动和磁场下的手征相变  

Chiral Phase Transition for the Rotation and External Magnetic Field

作　　者：李聪怡 

机构地区：[1]华北电力大学,数理学院,北京

出　　处：《应用物理》2022年第3期149-158,共10页Applied Physics

摘　　要：关于磁场和角速度对强相互作用相变的影响,一些学者已经开展了一定的研究。研究表明系统旋转会抑制夸克凝聚,且选取的旋转系统的半径对动力学夸克质量也有影响,π介子在磁场中旋转对其凝聚起促进作用等。本文针对重离子的非对心碰撞,对同时存在磁场和旋转的强相互作用相变进行了研究。考虑到QCD渐进自由的本质特征,用变耦合参数和含有夸克自由度的NJL模型,得到了格点QCD预测的反磁催化现象,探究了磁场和旋转角速度对手征相变的临界温度的影响。Some studies have been carried out on the influence of magnetic field and angular velocity on phase transition of strong interaction. The rotation can inhibit the quark condensation, and the selected radius in a rotation system also has an effect on the mass of the dynamical quark. The rotation of pion in magnetic field promotes its condensation. Given the non-central collision of heavy ions, we investigate phase transition of strong interaction with both magnetic field and rotation. In view of the fact that asymptotic freedom of QCD, we take the NJL model of variable coupling parameters and containing quark freedoms, obtain the inverse magnetic catalysis phenomenon predicted by lattice QCD, and study the influence of magnetic field and rotational angular velocity on the critical temperature of chiral phase transformation.

关 键 词：磁场 旋转 手征凝聚 手征对称性 

分 类 号：O57[理学—粒子物理与原子核物理]