Speaker
Félix Driencourt-Mangin
(IFIC, UV-CSIC)
Description
We propose a new algorithm based on the Loop-Tree Duality theorem to renormalise and calculate two-loop diagrams. The ultraviolet singularities are locally cancelled in a systematic way and at the integrand level, allowing for a full four-dimensional numerical implementation of the method. In particular, we apply the method to calculate the $H\to\gamma\gamma$ amplitude at two-loop level, and find an excellent agreement with already available literature results. We also present other advantages of the Loop-Tree Duality formalism, such as the possibility to write unintegrated amplitudes in a universal way, regardless of the particle running inside the loop.
Primary author
Félix Driencourt-Mangin
(IFIC, UV-CSIC)
Co-authors
German Rodrigo
(IFIC CSIC-UV)
German Sborlini
(Università di Milano, INFN Milano and IFIC-Valencia)
William Javier Torres Bobadilla
(IFIC CSIC-UV)
