arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0710.4530hep-ph
收藏

指数修正的QCD耦合

Exponentially Modified QCD Coupling

Gorazd Cvetic, Cristian Valenzuela

摘要:

我们提出了一类特殊的红外有限分析QCD耦合的模型,使得在大的类空能量尺度的耦合不同于微扰的能量尺度小于任何逆功率。这种情况是由ITEP算子乘积展开原理引起的。允许的模糊性在分析的扰动耦合,建议类耦合有三个参数。在中能区,所提出的耦合具有低的环能级和重整化方案的依赖性。本文对微扰QCD的修正是一种唯象的尝试,其目的是扩大低能强相互作用理论的适用范围。

英文摘要:

We present a specific class of models for an infrared-finite analytic QCD coupling, such that at large space-like energy scales the coupling differs from the perturbative one by less than any inverse power of the energy scale. This condition is motivated by the ITEP Operator Product Expansion philosophy. Allowed by the ambiguity in the analytization of the perturbative coupling, the proposed class of couplings has three parameters. In the intermediate energy region, the proposed coupling has low loop-level and renormalization scheme dependence. The present modification of perturbative QCD must be considered as a phenomenological attempt, with the aim of enlarging the applicability range of the theory of the strong interactions at low energies.

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。

↑