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Neutral MSSM Higgs-boson production at \(\mathrm{e^+e^-}\) colliders in the Feynman-diagrammatic approach

  • S. Heinemeyer
  • W. Hollik
  • J. Rosiek
  • G. Weiglein
Theoretical physics

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.

Keywords

Minimal Supersymmetric Standard Model External Momentum Renormalization Scheme Propagator Correction LEP2 Energy 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • S. Heinemeyer
    • 1
  • W. Hollik
    • 2
  • J. Rosiek
    • 3
  • G. Weiglein
    • 4
  1. 1.HET, Physics Department, Brookhaven Natl. Lab., Upton, NY 11973, USA US
  2. 2.Institut für Theoretische Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany DE
  3. 3.Physik-Department, Technische Universität München, 85747 Garching, Germany DE
  4. 4.CERN, TH Division, 1211 Geneva 23, Switzerland CH

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