arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0910.4682hep-lathep-phhep-th
收藏

猝灭SU中手征磁效应的数值研究(2)格点规范理论

Numerical study of chiral magnetic effect in quenched SU(2) lattice gauge theory

P. V. Buividovich, M. N. Chernodub, E. V. Luschevskaya, M. I. Polikarpov

摘要:

STAR协作组最近报道了RHIC重离子碰撞中手征磁效应的一个可能的实验观测。我们在SU(2)格点胶子动力学中用手征不变的Dirac算符研究了这种效应的特征。我们发现,在零温度下,夸克电流的局域涨落和手征性涨落随外加阿贝尔磁场的增加而增加。外部磁场导致夸克的电荷空间分离。分离随着磁场的强度而增加。温度越高,这些量对磁场强度的依赖性就越弱。在退禁闭阶段,手征密度和夸克电流空间分量的局部涨落很大,并且几乎与外部磁场无关。在该阶段,电荷密度的局部波动随着磁场的强度而减小。

英文摘要:

A possible experimental observation of the chiral magnetic effect in heavy ion collisions at RHIC was recently reported by the STAR Collaboration. We study signatures of this effect in SU(2) lattice gluodynamics with the chirally invariant Dirac operator. We find that at zero temperature the local fluctuations of an electric current of quarks and chirality fluctuations increase with external Abelian magnetic field. The external magnetic field leads to spatial separation of the quark's electric charges. The separation increases with the strength of the magnetic field. As temperature gets higher the dependence of these quantities on the strength of the magnetic field becomes weaker. In the deconfinement phase the local fluctuations of the chiral density and of the spatial components of the quarks electric current are large and are almost independent on the external magnetic field. The local fluctuations of the electric charge density decrease with the strength of the magnetic field in this phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑