Gauge invariance at work in FDR: H → γγ

被引：18

作者：

Donati, Alice M. ^{[1
]}

Pittau, Roberto

机构：

[1] Univ Granada, Dept Fis Teor & Cosmos, Campus Fuentenueva Sn, E-18071 Granada, Spain

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2013年 / 04期

关键词：

Higgs Physics; Scattering Amplitudes; Standard Model; Renormalization Regularization and Renormalons; ONE-LOOP CALCULATIONS; FEYNMAN DIAGRAMS; RENORMALIZATION; REGULARIZATION; AMPLITUDES;

D O I：

10.1007/JHEP04(2013)167

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present the first complete calculation performed within the Four Dimensional Regularization scheme (FDR), namely the loop-induced on-shell amplitude for the Higgs boson decay into two photons in an arbitrary R-xi gauge. FDR is a new technique -free of infinities-for addressing multi-loop calculus, which automatically preserves gauge invariance, allowing for a 4-dimensional computation at the same time. We obtained the same result as that assessed in dimensional regularization, thereby explicitly verifying, in a realistic case, that FDR respects gauge invariance.

引用

页数：18