Automating the Powheg method in Sherpa

Abstract

A new implementation of the Powheg method [1, 2] into the Monte-Carlo event generator Sherpa [3, 4] is presented, focusing on processes with a simple colour structure. Results for a variety of reactions, namely e+e - →hadrons, deep-inelastic leptonnucleon scattering, hadroproduction of single vector bosons and of vector boson pairs as well as the production of Higgs bosons in gluon fusion serve as test cases for the successful realisation. The algorithm is highly automated such that for other processes with simple colour topology only virtual matrix elements need to be provided. © SISSA 2011.