Possible enhancement of the \(e^+e^- \rightarrow H^\pm W^\mp\) cross section in the two-Higgs-doublet model

  • S. Kanemura
Theoretical physics


The production process of the charged Higgs boson associated with a W boson at electron–positron colliders is discussed in the two-Higgs-doublet model (2HDM) and in the minimal supersymmetric standard model (MSSM). The process is induced at one-loop level in these models. We examine how much the cross section can be enhanced by quark- and Higgs-loop effects. In the non-SUSY 2HDM, in addition to large top–bottom (tb) loop effects for small \(\tan \beta (\ll (m_t/m_b)^{1/2})\), the Higgs-loop diagrams can contribute to the cross section to some extent for moderate \(\tan \beta\) values. For larger \(\tan \beta\) (\(\gg (m_t/m_b)^{1/2}\)), such an enhancement by the Higgs non-decoupling effects is bounded by the requirement of the validity of perturbation theory. In the MSSM with heavy superpartner particles, only the tb loops enhance the cross section while Higgs-loop effects are very small.


Production Process Perturbation Theory Higgs Boson Minimal Supersymmetric Standard Model Charged Higgs Boson 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • S. Kanemura
    • 1
  1. 1.Institut für Theoretische Physik der Universität Karlsruhe, 76128 Karlsruhe, GermanyDE

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