Eur. Phys. J. C (2010) 67: 617-636
https://doi.org/10.1140/epjc/s10052-010-1320-8

Special Article - Tools for Experiment and Theory

Charged Higgs boson production in association with a top quark in MC@NLO

¹ Laboratoire de Physique Subatomique et de Cosmologie, UJF, CNRS/IN2P3, INPG, 53 avenue des Martyrs, 38026, Grenoble cedex, France
² PH Department, TH unit, CERN, 1211, Geneva 23, Switzerland
³ ITPP, EPFL, CH-1015, Lausanne, Switzerland
⁴ Nikhef Theory Group, Science Park 105, 1098 XG, Amsterdam, The Netherlands
⁵ Institute for Theoretical Physics, University of Amsterdam, Valckenierstraat 65, 1018 XE, Amsterdam, The Netherlands
⁶ Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE, Utrecht, The Netherlands
⁷ Institut für Theoretische Physik, Universität Heidelberg, Heidelberg, Germany
⁸ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL, 60510-5011, USA
⁹ Institute for Particle Physics Phenomenology, Department of Physics, Durham University, Durham, DH1 3LE, UK

^* e-mail: c.d.white@durham.ac.uk

Received: 19 February 2010
Published online: 1 May 2010

Abstract

We discuss the calculation of charged Higgs boson production in association with a top quark in the MC@NLO framework for combining NLO matrix elements with a parton shower. The process is defined in a model-independent manner for wide applicability, and can be used if the charged Higgs boson mass is either greater or less than the mass of the top quark. For the latter mass region, care is needed in defining the charged Higgs production mode due to interference with top pair production. We give a suitable definition applicable in an NLO (plus parton shower) context, and we present example results for the LHC.