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arXiv · 1210.6684

High multiplicity processes at NLO with BlackHat and Sherpa

Zvi Bern·Kemal Ozeren·Lance J. Dixon·Stefan Hoeche·Fernando Febres Cordero·Harald Ita·David Kosower·Daniel Maître
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Abstract

In this contribution we review recent progress with fixed-order QCD predictions for the production of a vector boson in association with jets at hadron colliders, using the programs BlackHat and SHERPA. We review general features of next-to-leading-order (NLO) predictions for the production of a massive vector boson in association with four jets. We also discuss how precise descriptions of vector-boson production can be applied to the determination of backgrounds to new physics signals. Here we focus on data-driven backgrounds to a missing-energy-plus-jets search performed by CMS. Finally, we review recent progress in developing theoretical tools for high-multiplicity loop-computation within the BlackHat-library. In particular, we discuss methods for handling the color degrees of freedom in multi-jet predictions at NLO.

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Zvi Bern, Kemal Ozeren, Lance J. Dixon, Stefan Hoeche, Fernando Febres Cordero, Harald Ita, David Kosower, Daniel Maître. 2012-10-24. High multiplicity processes at NLO with BlackHat and Sherpa. https://arxiv.org/abs/1210.6684

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