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arXiv · 1603.01178

Off-shell single-top production at NLO matched to parton showers

Rikkert Frederix·Stefano Frixione·Andrew S. Papanastasiou·Stefan Prestel·Paolo Torrielli
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Abstract

We study the hadroproduction of a $Wb$ pair in association with a light jet, focusing on the dominant $t$-channel contribution and including exactly at the matrix-element level all non-resonant and off-shell effects induced by the finite top-quark width. Our simulations are accurate to the next-to-leading order in QCD, and are matched to the HERWIG6 and PYTHIA8 parton showers through the MC@NLO method. We present phenomenological results relevant to the 8 TeV LHC, and carry out a thorough comparison to the case of on-shell $t$-channel single-top production. We formulate our approach so that it can be applied to the general case of matrix elements that feature coloured intermediate resonances and are matched to parton showers.

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Rikkert Frederix, Stefano Frixione, Andrew S. Papanastasiou, Stefan Prestel, Paolo Torrielli. 2016-03-03. Off-shell single-top production at NLO matched to parton showers. https://doi.org/10.1007/jhep06(2016)027

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