Electroweak radiative corrections to e+ e- -> nu nubar H
Abstract
The complete electroweak O(alpha) radiative corrections to the Higgs-boson production processes e+ e- -> nul anti-nul H (l=e,mu,tau) are calculated in the electroweak Standard Model. For e+ e- -> nue anti-nue H, where ZH production and W-boson fusion contribute, both production channels are added coherently. The calculation of the corrections is described in some detail including, in particular, the treatment of the Z-boson resonance in the ZH-production channel. The discussion of numerical results focusses on the total cross section as well as on angular and energy distributions of the Higgs boson. In the Gmu-scheme, the bulk of the corrections is due to initial-state radiation. The corrections turn out to reduce the total cross section by 10% for high energies, where the W-boson fusion dominates. In this region, the corrections depend only weakly on the energy and the production angle of the Higgs boson. Based on an analysis of the leading universal corrections, a simple improved Born approximation is introduced. This approximation describes the corrected cross section within about 3%.
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