Merging meets matching in MC@NLO

2012/09/27 by Rikkert Frederix, Stefano Frixione · 8 citations
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1007/jhep12(2012)061

40 pages, 14 figures

arxiv created 2012/09/27 · arxiv updated 2015/06/11

Abstract

The next-to-leading order accuracy for MC@NLO results exclusive in J light jets is achieved if the computation is based on matrix elements that feature J and J+1 QCD partons. The simultaneous prediction of observables which are exclusive in different light-jet multiplicities cannot simply be obtained by summing the above results over the relevant range in J; rather, a suitable merging procedure must be defined. We address the problem of such a merging, and propose a solution that can be easily incorporated into existing MC@NLO implementations. We use the automated aMC@NLO framework to illustrate how the method works in practice, by considering the production at the 8 TeV LHC of a Standard Model Higgs in association with up to J=2 jets, and of an eν_e pair or a tt pair in association with up to J=1 jet.

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