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arXiv · 1011.5444

QCD parton showers and NLO EW corrections to Drell-Yan

P. Richardson·R. R. Sadykov·A. A. Sapronov·M. H. Seymour·P. Z. Skands
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Abstract

We report on the implementation of an interface between the SANC generator framework for Drell-Yan hard processes, which includes next-to-leading order electroweak (NLO EW) corrections, and the Herwig++ and Pythia8 QCD parton shower Monte Carlos. A special aspect of this implementation is that the initial-state shower evolution in both shower generators has been augmented to handle the case of an incoming photon-in-a-proton, diagrams for which appear at the NLO EW level. The difference between shower algorithms leads to residual differences in the relative corrections of 2-3% in the p_T(mu) distributions at p_T(mu)>~50 GeV (where the NLO EW correction itself is of order 10%).

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P. Richardson, R. R. Sadykov, A. A. Sapronov, M. H. Seymour, P. Z. Skands. 2010-11-24. QCD parton showers and NLO EW corrections to Drell-Yan. https://doi.org/10.1007/jhep06(2012)090

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