Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série LPT-PTH
Domaines hep-ph
Date Jeudi 22 Fevrier 2018
Heure 16:00
Institut LPT
Salle 114
Nom de l'orateur Larsen
Prenom de l'orateur Kasper
Addresse email de l'orateur
Institution de l'orateur Southampton University
Titre Algebraic geometry applied to multi-loop scattering amplitudes
Résumé The computation of two-loop amplitudes forms a current bottleneck to computing precision- level cross sections for LHC phenomenology. In this talk I will discuss several new methods for analytic evaluation of two-loop amplitudes, drawing inspiration from algebraic geometry and modern unitarity. More specifically, the methods involve efficient determination of a basis of integrals in terms of which the amplitude is decomposed; derivation of the integral identities needed to perform the decomposition; and evaluation of the basis integrals via differential equations. The first step of determining a basis of integrals has been implemented in the publicly available code Azurite which I will discuss. I will also discuss future implementations of the methods and their application to computing the two-loop five-gluon QCD amplitude.
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