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arXiv 2109.03532hep-lat
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关于类$SU(2)_{CS}$群和费米子action在QCD中的不变性

On $SU(2)_{CS}$-like groups and invariance of the fermionic action in QCD

Marco Catillo

摘要:

在这项工作中,我们引进了一些新的$U(1)$对称群的自由费米子作用在欧几里德时空,这是一个后果的宇称和时间反演对称。然后,我们讨论了规范相互作用的引入如何影响作用量的不变性,特别是关于QCD。此外,受最近\textit{Glozman et al.}的QCD晶格结果的启发,其中一个有趣的和意想不到的对称群,即$SU(2)_{CS}$(其中包含$U(1)_A$作为子群),我们建立了其他$SU(2)_{CS}$类群在欧氏时空中使用以前介绍的$U(1)$群。最后讨论了费米子作用量对这些新的类$SU(2)_{CS}$群的可能不变性及其对强子时间算符的影响。

英文摘要:

In this work, we introduce some new $U(1)$ symmetry groups of the free fermionic action in euclidean space-time, which are a consequence of parity and time-reversal symmetries. Afterwards, we discuss how the introduction of a gauge interaction affects the invariance of the action, with special reference to QCD. Moreover, inspired by recent QCD lattice results of \textit{Glozman et al.}, in which an interesting and unexpected symmetry group has been observed, namely $SU(2)_{CS}$ (that contains $U(1)_A$ as subgroup), we build other $SU(2)_{CS}$-like groups in euclidean space-time using the previous introduced $U(1)$ groups. Finally we argue about the possible invariance of the fermionic action with respect these new $SU(2)_{CS}$-like groups and its consequence on the hadron temporal correlators.

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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