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arXiv 1611.02413hep-lat
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利用梯度流研究拓扑磁化率的温度依赖性

Temperature dependence of topological susceptibility using gradient flow

Yusuke Taniguchi, Shinji Ejiri, Kazuyuki Kanaya, Masakiyo Kitazawa, Hiroshi Suzuki, Takashi Umeda, Ryo Iwami, Naoki Wakabayashi

摘要:

研究了具有$N_{f}=2+1$味的Wilson费米子的拓扑磁化率的温度依赖性。我们对这份文件有两个主要兴趣。一个是拓扑磁化率的胶子和费米定义的比较。这两个定义通过手征沃德-高桥恒等式联系在一起,但它们的重合对于威尔逊费米子来说是非常重要的。通过对规范场和夸克场都应用梯度流,我们发现这两种测量结果很好地吻合。另一个是验证了在低温区$T_{pc}< T<1.5T_{pc}$的稀瞬子气体近似的预言,在此我们证实了三种味QCD的拓扑磁化率随$χ_{t}\propto(T/T_{pc})^{-8}$幂衰减的预言。

英文摘要:

We study temperature dependence of the topological susceptibility with the $N_{f}=2+1$ flavors Wilson fermion. We have two major interests in this paper. One is a comparison of gluonic and fermionic definitions of the topological susceptibility. Two definitions are related by the chiral Ward-Takahashi identity but their coincidence is highly non-trivial for the Wilson fermion. By applying the gradient flow both for the gauge and quark fields we find a good agreement of these two measurements. The other is a verification of a prediction of the dilute instanton gas approximation at low temperature region $T_{pc}< T<1.5T_{pc}$, for which we confirm the prediction that the topological susceptibility decays with power $χ_{t}\propto(T/T_{pc})^{-8}$ for three flavors QCD.

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。

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