Speaker
Colomba Brancaccio
Description
I will present the calculation of two-loop QCD amplitudes for the radiative top decay process t->Wbg, with the W-boson decay to a lepton-neutrino pair included. This amplitude is required in the computation of top quark pair production in association with a jet at NNLO QCD accuracy where the top decays are included in the narrow width approximation. Analytic form of the two-loop helicity amplitudes are derived in terms of master integrals. These master integrals are evaluated numerically using generalised series expansion method to solve the associated differential equations.
| Field | Pheno |
|---|
Authors
Colomba Brancaccio
Heribertus Bayu Hartanto
(Asia Pacific Center for Theoretical Physics (APCTP), Pohang, South Korea)
Manfred Kraus
(UNAM)
