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t $ \bar{\mathrm{t}} $ W± + t $ \bar{\mathrm{t}} $ Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects

t \( \bar{\mathrm{t}} \) W± + t \( \bar{\mathrm{t}} \) Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects

Abstract

We present theoretical predictions for the hadroproduction of t \( \bar{\mathrm{t}} \) W+, t \( \bar{\mathrm{t}} \) W− and t \( \bar{\mathrm{t}} \) Z at LHC as obtained by matching numerical computations at NLO accuracy in QCD with Shower Monte Carlo programs. The calculation is performed by PowHel, relying on the POWHEG-BOX framework, that allows for the matching between the fixed order computation, with input of matrix elements produced by the HELAC-NLO collection of event generators, and the Parton Shower evolution, followed by hadronization and hadron decays as described by PYTHIA and HERWIG. We focus on the dilepton and trilepton decay channels, studied recently by the CMS Collaboration.

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Author information Authors and Affiliations

  1. Laboratory for Astroparticle Physics, University of Nova Gorica, SI-5000, Nova Gorica, Slovenia

    M. V. Garzelli

  2. Institute of Physics and MTA-DE Particle Physics Research Group, University of Debrecen, H-4010, Debrecen, P.O.Box 105, Hungary

    A. Kardos & Z. Trócsányi

  3. Institute of Nuclear Physics, NCSR Δημóκριτ oς, GR-15310, Athens, Greece

    C. G. Papadopoulos

  4. CERN, TH-Unit, CH-1211, Geneva 23, Switzerland

    C. G. Papadopoulos

Authors
  1. M. V. Garzelli
  2. A. Kardos
  3. C. G. Papadopoulos
  4. Z. Trócsányi
Corresponding author

Correspondence to Z. Trócsányi.

Additional information

ArXiv ePrint: 1208.2665

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Garzelli, M.V., Kardos, A., Papadopoulos, C.G. et al. t \( \bar{\mathrm{t}} \) W± + t \( \bar{\mathrm{t}} \) Z hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects. J. High Energ. Phys. 2012, 56 (2012). https://doi.org/10.1007/JHEP11(2012)056

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