A positive-weight next-to-leading order Monte Carlo simulation of Drell-Yan vector boson production

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Published 3 October 2008 • Published under licence by IOP Publishing Ltd
, , Citation Keith Hamilton et al JHEP10(2008)015 DOI 10.1088/1126-6708/2008/10/015

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Author affiliations

1 Centre for Particle Physics and Phenomenology (CP3), Université Catholique de Louvain, Chemin du Cyclotron 2, 1348 Louvain-la-Neuve, Belgium

2 Institute of Particle Physics Phenomenology, Department of Physics, University of Durham, Durham, DH1 3LE, U.K.

3 Theoretical Physics Group, CERN, CH-1211 Geneva 23, Switzerland

Dates

  1. Received 17 July 2008
  2. Accepted 19 September 2008
  3. Published

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1126-6708/2008/10/015

Abstract

The positive weight next-to-leading-order (NLO) matching scheme (POWHEG) is applied to Drell-Yan vector boson production in the Herwig++ Monte Carlo event generator. This approach consistently combines the NLO calculation and parton shower simulation without the production of negative weight events. The simulation includes a full implementation of the truncated shower required to correctly describe soft emissions in an angular-ordered parton shower, for the first time. The results are compared with Tevatron W± and Z production data. Predictions for the transverse momentum spectrum of gauge bosons at the LHC are presented.

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10.1088/1126-6708/2008/10/015