Testing Higgs self-couplings at e+e- linear colliders
A. Djouadi1 - W. Kilian2 - M. Mühlleitner3 - P.M. Zerwas3
1 Lab. de Physique Mathématique,
Université Montpellier, F-34095 Montpellier Cedex 5,
2 Institut für Theoretische Teilchenphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany
3 Deutsches Elektronen-Synchrotron DESY, D-22603 Hamburg, Germany
Received: 3 March 1999 / Published online: 15 July 1999
To establish the Higgs mechanism sui generis experimentally, the self-energy potential of the Higgs field must be reconstructed. This task requires the measurement of the trilinear and quadrilinear self-couplings, as predicted, for instance, in the Standard Model or in supersymmetric theories. The couplings can be probed in multiple Higgs production at high-luminosity e+e- linear colliders. Complementing earlier studies to develop a coherent picture of the trilinear couplings, we have analyzed the production of pairs of neutral Higgs bosons in all relevant channels of double Higgs-strahlung, associated multiple Higgs production and WW/ZZ fusion to Higgs pairs.