Eur. Phys. J. C (2007) 52: 397-411
https://doi.org/10.1140/epjc/s10052-007-0397-1

Regular Article - Theoretical Physics

On MSSM charged Higgs-boson production in association with an electroweak W boson at electron–positron colliders

¹ Institute for Particle Physics Phenomenology, University of Durham, South Rd., DH1 3LE, Durham, UK
² Max-Planck-Institut für Physik, Föhringer Ring 6, 80805, München, Germany

^* e-mail: oliver.brein@durham.ac.uk

Received: 1 June 2007
Revised: 9 July 2007
Accepted: 9 July 2007
Published online: 6 September 2007

Abstract

We present a calculation of the cross section for the process e⁺e^-→W^±H^∓ in the minimal supersymmetric standard model (MSSM) and the two Higgs doublet model (THDM). We study the basic features of the MSSM prediction for some distinctive parameter scenarios. We find large effects from virtual third-generation squarks for scenarios with large mixing, which can lead to a cross section vastly different from a THDM with identical Higgs sector parameters. We investigate this interesting behaviour in more detail by thoroughly scanning the MSSM parameter space for regions of large cross section. For a charged Higgs boson too heavy to be pair produced at a future high-energy electron–positron collider it turns out that a large MSSM cross section with a good chance of observation is linked to a squark mass scale below 600 GeV and a considerable amount of mixing in either the stop and sbottom sector.