Speaker
Kay Schonwald
(U. of Zürich)
Description
ggxy is a C++ library which currently includes gg $\to$ HH up to NLO in QCD. It is able to produce differential distributions in about 30 minutes on a laptop, both for on-shell and MSbar top quark masses and including a 7-point scale variation. ggxy has been linked to Powheg and Herwig to enable the matching to parton showers. Runtime tests have shown that it is a faster a by a factor of 4-5 with respect to the previous implementations mainly due to the fast numerical evaluation of the one-loop 2 $\to$ 3 processes for the real corrections with Recola.
