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arXiv 2302.04827hep-thhep-lathep-ph
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Landau 规范下与标量场耦合的改进型 Gribov-Zwanziger 理论

Refined Gribov-Zwanziger theory coupled to scalar fields in the Landau gauge

Gustavo P. de Brito, Philipe De Fabritiis, Antonio D. Pereira

AI总结:

本文将标量场耦合至 Landau 规范下的改进型 Gribov-Zwanziger 作用量,计算了规范群伴随表示的单圈标量传播子,发现其与格点数据吻合,表明胶子传播子的非微扰信息能重现红外区带色物质场关联函数行为。

摘要:

Landau 规范下的改进型 Gribov-Zwanziger(RGZ)作用量解释了无穷小 Gribov 拷贝的存在,以及欧几里得 Yang-Mills 理论红外区动力学凝聚的形成。我们将标量场耦合到 RGZ 作用量,并计算了规范群伴随表示下的单圈标量传播子。我们将研究结果与现有的格点数据进行了比较。本文讨论了该模型中 BRST 对称性的命运,并与先前关于物质与 RGZ 作用量之间非最小耦合的方案进行了比较。我们发现,对于将 RGZ 胶子传播子拟合到格点的质量参数值,标量传播子的格点数据吻合良好。这表明 RGZ 框架中胶子传播子携带的非微扰信息提供了一种合适的机制,能够重现红外区带色物质场关联函数的行为。

英文摘要:

The Refined Gribov-Zwanziger (RGZ) action in the Landau gauge accounts for the existence of infinitesimal Gribov copies as well as the dynamical formation of condensates in the infrared of Euclidean Yang-Mills theories. We couple scalar fields to the RGZ action and compute the one-loop scalar propagator in the adjoint representation of the gauge group. We compare our findings with existing lattice data. The fate of BRST symmetry in this model is discussed, and we provide a comparison to a previous proposal for a non-minimal coupling between matter and the RGZ action. We find good agreement with the lattice data of the scalar propagator for the values of the mass parameters that fit the RGZ gluon propagator to the lattice. This suggests that the non-perturbative information carried by the gluon propagator in the RGZ framework provides a suitable mechanism to reproduce the behavior of correlation functions of colored matter fields in the infrared.

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