Speaker
Description
We present two precision tools for the simulation of Higgs-pair
production via vector-boson fusion in the kappa framework for the
parameterization of non-standard Higgs couplings.
A new implementation of the process is developed in the framework of
the POWHEG-BOX program that can be used to provide predictions at the
next-to-leading order (NLO) of QCD matched to parton showers (PS).
In addition, the existing proVBFHH program for the computation of
next-to-next-to-leading order (NNLO) QCD and
next-to-next-to-next-to-leading order QCD corrections is extended to
account for values of the Higgs couplings different from the
expectation of the Standard Model.
We systematically compare and analyse predictions obtained with the
two programs and find that the NLO+PS predictions provide a good
approximation of the NNLO results for observables of the tagging jets
and Higgs bosons. The results turn out to be very sensitive to the
values of the modified Higgs couplings.
