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arXiv 0802.1183hep-thhep-lathep-ph
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标量场理论中运行耦合的红外行为

Infrared behavior of the running coupling in scalar field theory

Marco Frasca

摘要:

我们计算了无质量标量场理论在红外波段的格林函数,直到次超前阶,提供了一个完全协变的强耦合展开式。应用Callan-Symanzik方程,我们通过计算beta函数获得了这种情况下的精确运行耦合。这一结果是应用最近证明的映射定理之间的无质量标量场理论和杨米尔斯理论。这个β函数给出了一个趋于零的运行耦合,作为$p^4$,与Boucaud等人[JHEP 0304(2003)005]中提出的晶格结果一致,并表明在红外中Yang-Mills理论的运行耦合的正确定义是在一个近似方案中给出的。新兴的方案是支持量子场论的基础上瞬子。

英文摘要:

We compute the Green function of the massless scalar field theory in the infrared till the next-to-leading order, providing a fully covariant strong coupling expansion. Applying Callan-Symanzik equation we obtain the exact running coupling for this case by computing the beta function. This result is applied using a recently proved mapping theorem between a massless scalar field theory and Yang-Mills theory. This beta function gives a running coupling going to zero as $p^4$ in agreement with lattice results presented in Boucaud et al. [JHEP 0304 (2003) 005] and showing that the right definition of the running coupling for a Yang-Mills theory in the infrared is given in a MOM scheme. The emerging scenario is supporting a quantum field theory based on instantons.

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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