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arXiv 1807.07523hep-ph
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多耦合模型的重整化格式模糊性

Renormalization Scheme Ambiguities in the Models with More than One Coupling

D. G. C. McKeon, Chenguang Zhao

摘要:

为了消除量子场论中出现的发散而进行的重整化过程并不是唯一定义的;人们总是可以进行有限重整化,从而使有限微扰的结果变得模棱两可。在存在一个或两个耦合的情况下,研究了进行这种有限重正化的后果。在本文中,我们考虑如何有限重整化可以影响更一般的模型,其中有两个以上的耦合。特别地,我们考虑标准模型,其中基本上有五个耦合。我们证明了在这个模型中(当忽略所有质量参数时),如果我们使用质量无关重整化,那么重整化群的β函数在超过一个圈阶后就不再是唯一的,一般不可能消除所有这些β函数的超过一定阶的项,但是对于一个物理过程,超过一个圈阶的所有贡献都可以归入β函数中.

英文摘要:

The process of renormalization to eliminate divergences arising in quantum field theory is not uniquely defined; one can always perform a finite renormalization, rendering finite perturbative results ambiguous. The consequences of making such finite renormalizations have been examined in the case of there being one or two couplings. In this paper we consider how finite renormalizations can affect more general models in which there are more than two couplings. In particular, we consider the Standard Model in which there are essentially five couplings. We show that in this model (when neglecting all mass parameters) if we use mass independent renormalization, then the renormalization group beta-functions are not unique beyond one loop order, that it is not in general possible to eliminate all terms beyond certain order for all these beta-functions, but that for a physical process all contributions beyond one loop order can be subsumed into the beta-functions.

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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