Abstract.
We calculate the cross sections for the neutral Higgs-boson production at \(e^+e^-\) colliders in the Minimal Supersymmetric Standard Model (MSSM) using the Feynman-diagrammatic approach and the on-shell renormalization scheme. We incorporate the Higgs-boson propagator corrections, evaluated up to two-loop order, into the prediction of the cross sections for the Higgs-boson production mechanism \(e^+e^- \to hZ,hA\). The propagator corrections consist of the full one-loop contribution, including the effects of non-vanishing external momentum, and at the two-loop level of the dominant corrections of \({\cal O}(\alpha\alpha_s)\) and further sub-dominant contributions. The results are supplemented with the complete set of one-loop vertex and box corrections. The effects of the two-loop propagator corrections are investigated in detail. We briefly discuss also the effect of the box contributions for high \(\sqrt{s}\). We compare our results with the case where only the corrections to the effective mixing angle, evaluated within the renormalization-group-improved one-loop Effective Potential approach, are taken into account. We find agreement better than 10% for LEP2 energies and deviations larger than 20% for \(\sqrt{s} = 500\) GeV.
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Received: 7 February 2001 / Published online: 23 March 2001
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Heinemeyer, S., Hollik, W., Rosiek, J. et al. Neutral MSSM Higgs-boson production at \(\mathrm{e^+e^-}\) colliders in the Feynman-diagrammatic approach. Eur. Phys. J. C 19, 535–546 (2001). https://doi.org/10.1007/s100520100631
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DOI: https://doi.org/10.1007/s100520100631