Regular Article – Theoretical Physics
Diphoton decay of the higgs from the Epstein–Glaser viewpoint
Institut für Theoretische Physik, Universität Leipzig, 04103, Leipzig, Germany
2 Max-Planck Institute for Mathematics in the Sciences, 04103, Leipzig, Germany
3 Institut für Theoretische Physik, Universität Göttingen, 37077, Göttingen, Germany
4 CAPA and Departamento de Física Teórica, Universidad de Zaragoza, 50009, Zaragoza, Spain
5 Laboratorio de Física Teórica y Computacional, Universidad de Costa Rica, 11501, San Pedro, Costa Rica
Accepted: 21 January 2021
Published online: 6 February 2021
We revisit a nearly 10-year old controversy on the diphoton decay of the Higgs particle. To a large extent, the controversy turned around the respective merits of the regularization techniques employed. The novel aspect of our approach is that no regularization techniques are brought to bear: we work within the Bogoliubov–Epstein–Glaser scheme of renormalization by extension of distributions. Solving the problem actually required an expansion of this method’s toolkit, furnished in the paper.
© The Author(s) 2021
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