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arXiv 2106.10074hep-phhep-lathep-th
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有限温度下QCD中某些局部和整体$U(1)$轴向凝聚体的研究

Study of some local and global $U(1)$ axial condensates in QCD at finite temperature

Nicoletta Carabba, Enrico Meggiolaro

摘要:

本工作的目的是通过两种非微扰分析方法研究QCD高温手征恢复相中可能的局部和整体$U(1)$轴向凝聚:(i)用Euclidean Dirac算符的谱密度表示泛函平均,(ii)在瞬子背景近似下计算泛函积分.这样,除了证明这些凝聚在高温区域确实不同于零之外,我们还将导出它们的渐近温度依赖性,并将其与拓扑磁化率的渐近温度依赖性进行比较。

英文摘要:

The aim of this work is to study some possible local and global $U(1)$ axial condensates in the high-temperature chirally restored phase of QCD, by means of two nonperturbative analytical techniques: (i) by expressing the functional averages in terms of the spectral density of the Euclidean Dirac operator and (ii) by evaluating the functional integrals in the instanton-background approximation. In this way, besides proving that these condensates are indeed different from zero in the high-temperature regime, we shall also derive their asymptotic temperature dependence and compare it with that of the topological susceptibility.

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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