NLO matrix elements and truncated showers

Details NLO matrix elements and truncated showers NLO matrix elements and truncated showers

2010-09-06

arxiv.org/abs/1009.1127v2

JHEP 1108:123,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 24 figures, v2 as accepted for publication in JHEP: extended discussion of unitarity violations

Scientific paper

10.1007/JHEP08(2011)123

In this publication, an algorithm is presented that combines the ME+PS approach to merge sequences of tree-level matrix elements into inclusive event samples with the POWHEG method, which combines exact next-to-leading order matrix element results with the parton shower. It was developed in parallel to the MENLOPS technique and has been implemented in the event generator Sherpa. The benefits of this approach are exemplified by some first predictions for a number of processes, namely the production of jets in e+ e- annihilation, in deep-inelastic ep scattering, in association with single W, Z or Higgs bosons, and with vector boson pairs at hadron colliders.

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