In the algorithm presented here, the ME+PS approach to merge samples of tree-level matrix elements into inclusive event samples is combined with the POWHEG method, which includes exact next-to-leading order matrix elements in the parton shower. The advantages of the method are discussed and the quality of its implementation in Sherpa is exemplified by results for e+e- annihilation into hadrons at LEP, for deep-inelastic lepton-nucleon scattering at HERA, for Drell-Yan lepton-pair production at the Tevatron and for W+W- production at LHC energies.
@article{arxiv.1011.6657,
title = {Multi-jet merging with NLO matrix elements},
author = {Frank Siegert and Stefan Hoeche and Frank Krauss and Marek Schonherr},
journal= {arXiv preprint arXiv:1011.6657},
year = {2011}
}
Comments
5 pages, 8 figures, Proceedings of the 35th International Conference of High Energy Physics - ICHEP2010 (July 22-28, 2010, Paris)