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arXiv 2009.13637hep-phhep-exhep-latnucl-exnucl-th
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解决Bethe-Salpeter内核

Resolving the Bethe-Salpeter kernel

Si-Xue Qin, Craig D. Roberts

摘要:

描述了一种构造介子束缚态问题的Bethe-Salpeter核的新方法。它产生了一个封闭形式的核,它与由任何允许的胶子-夸克顶点定义的间隙方程是一致的(离散和连续的)。即使当该顶点的图形内容是未知的,该计划可以促进新的协同作用之间的连续和晶格方法的强相互作用。通过证明胶子-夸克顶点处的缀饰夸克反常磁矩(强相互作用的一个突现特征)的存在,可以弥补目前广泛使用的介子束缚态核的许多缺陷,包括赝标和矢量介子径向激发的能级有序性.

英文摘要:

A novel method for constructing a Bethe-Salpeter kernel for the meson bound-state problem is described. It produces a closed-form kernel that is symmetry-consistent (discrete and continuous) with the gap equation defined by any admissible gluon-quark vertex. Applicable even when the diagrammatic content of that vertex is unknown, the scheme can foster new synergies between continuum and lattice approaches to strong interactions. The framework is illustrated by demonstrating that the presence of a dressed-quark anomalous magnetic moment in the gluon-quark vertex, an emergent feature of strong interactions, can remedy many defects of widely used meson bound-state kernels, including the level ordering of pseudoscalar and vector meson radial excitations.

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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