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Title

Universal four-dimensional representation of H → γγ at two loops through the Loop-Tree Duality

AuthorsDriencourt-Mangin, F.; Rodrigo, Germán ; Sborlini, G.F.R.; Torres Bobadilla, W.J.
Issue DateFeb-2019
PublisherInstitute of Physics Publishing
CitationJournal of High Energy Physics 2019: 143 (2019)
AbstractWe extend useful properties of the H → γγ unintegrated dual amplitudes from one- to two-loop level, using the Loop-Tree Duality formalism. In particular, we show that the universality of the functional form — regardless of the nature of the internal particle — still holds at this order. We also present an algorithmic way to renormalise two-loop amplitudes, by locally cancelling the ultraviolet singularities at integrand level, thus allowing a full four-dimensional numerical implementation of the method. Our results are compared with analytic expressions already available in the literature, finding a perfect numerical agreement. The success of this computation plays a crucial role for the development of a fully local four-dimensional framework to compute physical observables at Next-to-Next-to Leading order and beyond.
URIhttp://hdl.handle.net/10261/195004
Identifiersdoi: 10.1007/JHEP02(2019)143
issn: 1029-8479
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