Merging meets matching in MC@NLOReport as inadecuate

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Journal of High Energy Physics

, 2012:61

First Online: 12 December 2012Received: 16 October 2012Accepted: 14 November 2012 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 eνe pair or a \ t\overline{t} \ pair in association with up to J = 1 jet.

KeywordsMonte Carlo Simulations NLO Computations ArXiv ePrint: 1209.6215

On leave of absence from INFN, Sezione di Genova, Italy. Stefano Frixione

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Author: Rikkert Frederix - Stefano Frixione



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