Abstract.
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 (t–b) 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 t–b loops enhance the cross section while Higgs-loop effects are very small.
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Received: 26 November 1999 / Revised version: 7 July 2000 / Published online: 8 September 2000
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Kanemura, S. Possible enhancement of the \(e^+e^- \rightarrow H^\pm W^\mp\) cross section in the two-Higgs-doublet model. Eur. Phys. J. C 17, 473–486 (2000). https://doi.org/10.1007/s100520000480
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DOI: https://doi.org/10.1007/s100520000480