Speaker
Dhimiter Canko
(Università di Bologna)
Description
I will present the numerical computation of the two-loop scattering amplitude for the associated hadron production of a top pair and a W boson, in the leading color approximation, which contributes to the virtual part of the NNLO QCD corrections to this process. The amplitude is expressed in terms of a basis of special functions multiplied by kinematic-dependent rational coefficients. The special functions are calculated by means of differential equations, while the rational coefficients are evaluated using finite-field techniques. Within this framework, we evaluate the two-loop finite remainders and obtain results for the NNLO QCD cross section.
Author
Dhimiter Canko
(Università di Bologna)