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Supersymmetry simulations with off-shell effects for the CERN LHC and an ILC

K. Hagiwara1,*, W. Kilian2,†, F. Krauss3,‡, T. Ohl4,§, T. Plehn5,∥, D. Rainwater6,¶, J. Reuter2,**, and S. Schumann3,††

  • 1Theory Division, KEK, Tsukuba, Japan
  • 2Theory Group, DESY, Hamburg, Germany
  • 3Institute for Theoretical Physics, University of Dresden, Dresden, Germany
  • 4Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Würzburg, Germany
  • 5Max Planck Institute for Physics, Munich, Germany
  • 6Department of Physics and Astronomy, University of Rochester, Rochester, New York, USA

  • *Email address: kaoru.hagiwara@kek.jp
  • †Email address: wolfgang.kilian@desy.de
  • ‡Email address: krauss@theory.phy.tu-dresden.de
  • §Email address: ohl@physik.uni-wuerzburg.de
  • ∥Email address: tilman.plehn@cern.ch
  • Email address: rain@pas.rochester.edu
  • **Email address: juergen.reuter@desy.de
  • ††Email address: steffen@theory.phy.tu-dresden.de
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Phys. Rev. D 73, 055005 – Published 13 March, 2006

DOI: https://doi.org/10.1103/PhysRevD.73.055005

Abstract

At the LHC and at an ILC, serious studies of new physics benefit from a proper simulation of signals and backgrounds. Using supersymmetric sbottom pair production as an example, we show how multiparticle final states are necessary to properly describe off-shell effects induced by QCD, photon radiation, or by intermediate on-shell states. To ensure the correctness of our findings we compare in detail the implementation of the supersymmetric Lagrangian in madgraph, sherpa and whizard. As a future reference we give the numerical results for several hundred cross sections for the production of supersymmetric particles, checked with all three codes.

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Phys. Rev. D 73, 055005– Published 13 March, 2006
  • Received 20 December 2005

© 2006 American Physical Society

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