https://doi.org/10.1051/epjconf/20136012014
The γγ decay of the Higgs boson in FDR
Departamento de Física Teórica y del Cosmos and CAFPE, Campus de Fuentenueva s.n., Universidad de Granada, E-18071, Granada, Spain
a e-mail: adonati@ugr.es. Speaker at LHCP 2013 (16/5/2013).
b e-mail: pittau@ugr.es
Published online: 26 November 2013
We review the first complete calculation performed within the Four Dimensional Regularization scheme (FDR), the recently-proposed approach for addressing multi-loop calculations, which is simultaneously free of infinities and gauge-invariant in 4 dimensions. As a case study, the 1-loop-induced amplitude for the Higgs boson decay into two photons was calculated in arbitrary gauge. The result obtained, identical to that assessed with standard methods, stands as an explicit test of the gauge-invariance property of FDR. Moreover, the calculation provides an insight into the use of the technique, in particular in the presence of fermions.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
