Sep 9 – 13, 2019
Europe/Zurich timezone

Master Integrals for the two-loop, non-planar QCD corrections to top-quark pair production in the quark-annihilation channel

Sep 12, 2019, 9:00 AM
25m
Chambre du Trésorier

Chambre du Trésorier

Speaker

Dr Matteo Becchetti (Center for Cosmology, Particle Physics and Phenomenology (CP3), Univeritè Catholique de Louvain )

Description

We present the analytic calculation of the Master Integrals for certain two-loop, non-planar topologies that enter the calculation of the amplitude for top-quark pair hadroproduction in the quark-annihilation channel. These Master Integrals are needed to complete the evaluation of the two color factors in the quark-annihilation channel which are not yet known analytically at two-loop. We compute the Master Integrals using the method of differential equations in canonical form. The solution is given as a series expansion in the dimensional regularisation parameter through to weight four, the expansion coefficients are given in terms of generalized harmonic polylogarithms of two dimensionless variables.

Primary authors

Dr Matteo Becchetti (Center for Cosmology, Particle Physics and Phenomenology (CP3), Univeritè Catholique de Louvain ) Roberto Bonciani Valerio Casconi (Università La Sapienza) Andrea Ferroglia (New York City College of Technology CUNY) Simone Lavacca (University of Rome Sapienza ) Andreas von Manteuffel (Michigan State University)

Presentation materials