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arXiv 2007.05642hep-phnucl-th
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有限能量和规则下QCD参数的磁效应

Magnetic effects of QCD parameters from finite energy sum rules

Cristian Villavicencio, C. A. Dominguez, M. Loewe

摘要:

有限能量和规则的优点之一是,算子乘积展开系列中的每个算子都可以通过使用适当的核函数来单独选择,该核函数去除了其他算子极点。在外部均匀磁场存在的情况下,QCD系统保持了这一特性,提供了关于QCD磁演化和强子参数的有趣信息。本文将有限能量和规则应用于轻夸克扇区的QCD,在均匀外磁场存在下,结合轴向通道和赝标通道,得到了轻夸克质量、π介子质量、π介子衰变常数、胶子凝聚和连续强子阈值的磁演化。

英文摘要:

One of the advantages of the finite energy sum rules is the fact that every operator in the operator product expansion series can be selected individually by the use of an appropriate kernel function which removes other operator poles. This characteristic is maintained by QCD systems in the presence of external homogeneous magnetic field, providing interesting information about the magnetic evolution of QCD and hadronic parameters. In this work finite energy sum rules are applied on QCD in the light quark sector, combining axial and pseudoscalar channels in the presence of an external homogeneous magnetic field, obtaining the magnetic evolution of the light quark masses, pion mass, the pion decay constant, the gluon condensate and the continuum hadronic threshold.

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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