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arXiv 1809.05940hep-phhep-th
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共形沃德恒等式及QED和QCD与引力的耦合

Conformal Ward Identities and the Coupling of QED and QCD to Gravity

Claudio Coriano, Matteo Maria Maglio

摘要:

基于最近文献中提出的共形沃德恒等式的解,采用张量算符的重构方法,对动量空间中共形场论(CFT)的三点函数进行了一般性研究.我们以QED和QCD为例,研究和详细描述了CWI的结构和它们的非微扰解,并将它们与微扰理论进行了比较。本文用自由场论中的微扰实现来匹配动量空间中平坦背景极限下的CFT的精确解,表明共形反常的起源与有效标量相互作用有关,而有效标量相互作用是由相应算符的纵向分量的重整化产生的。

英文摘要:

We present a general study of 3-point functions of conformal field theory (CFT) in momentum space, following a reconstruction method for tensor correlators, based on the solution of the conformal Ward identities (CWIs), introduced in recent works. We investigate and detail the structure of the CWIs and their non-perturbative solutions, and compare them to perturbation theory, taking QED and QCD as examples. Exact solutions of CFT's in the flat background limit in momentum space are matched by the perturbative realizations in free field theories, showing that the origin the conformal anomaly is related to efffective scalar interactions, generated by the renormalization of the longitudinal components of the corresponding operators.

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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