Eur. Phys. J. C (2012) 72: 2088
https://doi.org/10.1140/epjc/s10052-012-2088-9

Special Article - Tools for Experiment and Theory

Associated production of charged Higgs bosons and top quarks with POWHEG

¹ Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 9, 48149, Münster, Germany
² Institut für Theoretische Physik, Karlsruhe Institute of Technology, Postfach 6980, 76128, Karlsruhe, Germany
³ Sezione di Milano-Bicocca, INFN, Piazza della Scienza 3, 20126, Milan, Italy
⁴ Laboratoire de Physique Subatomique et de Cosmologie, Université Joseph Fourier/CNRS-IN2P3/INPG, 53 Avenue des Martyrs, 38026, Grenoble, France

^* e-mail: michael.klasen@uni-muenster.de

Received: 7 March 2012
Revised: 16 June 2012
Published online: 7 September 2012

Abstract

The associated production of charged Higgs bosons and top quarks at hadron colliders is an important discovery channel to establish the existence of a non-minimal Higgs sector. Here, we present details of a next-to-leading order (NLO) calculation of this process using the Catani–Seymour dipole formalism and describe its implementation in POWHEG, which allows to match NLO calculations to parton showers. Numerical predictions are presented using the PYTHIA parton shower and are compared to those obtained previously at fixed order, to a leading order calculation matched to the PYTHIA parton shower, and to a different NLO calculation matched to the HERWIG parton shower with MC@NLO. We also present numerical predictions and theoretical uncertainties for various Two Higgs Doublet Models at the Tevatron and LHC.