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NLO electroweak automation and precise predictions for W + multijet production at the LHC

S. Kallweit, J. M. Lindert, P. Maierhöfer, S. Pozzorini, M. Schönherr
2015 Journal of High Energy Physics  
Citation for published item: ullweitD F nd vindertD tF wF nd wierh¤ oferD F nd ozzoriniD F nd h¤ onherrD wF @PHISA 9xvy eletrowek utomtion nd preise preditions for C multijet prodution t the vrgF9D tournl of high energy physisFD PHIS @RAF HIPF Further information on publisher's website: httpsXGGdoiForgGIHFIHHUGtriHR@PHISAHIP Publisher's copyright statement: This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution
more » ... se, distribution and reproduction in any medium, provided the original author(s) and source are credited. Use policy The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full DRO policy for further details. Abstract: We present a fully automated implementation of next-to-leading order electroweak (NLO EW) corrections in the OpenLoops matrix-element generator combined with the Sherpa and Munich Monte Carlo frameworks. The process-independent character of the implemented algorithms opens the door to NLO QCD+EW simulations for a vast range of Standard Model processes, up to high particle multiplicity, at current and future colliders. As a first application, we present NLO QCD+EW predictions for the production of positively charged on-shell W bosons in association with up to three jets at the Large Hadron Collider. At the TeV energy scale, due to the presence of large Sudakov logarithms, EW corrections reach the 20-40% level and play an important role for searches of physics beyond the Standard Model. The dependence of NLO EW effects on the jet multiplicity is investigated in detail, and we find that W + multijet final states feature genuinely different EW effects as compared to the case of W + 1 jet.
doi:10.1007/jhep04(2015)012 fatcat:lix66jwlfzag7gzoqmtjhueukm