Portal de Periódicos da CAPES

HIGGS BOSON PRODUCTION VIA Z, W BOSONS AND TOPONIUM IN THE E 6 SUPERSTRING MODEL

1988; World Scientific; Volume: 03; Issue: 08 Linguagem: Inglês

10.1142/s0217751x88000801

1793-656X

V. Barger, K. Whisnant,

Computational Physics and Python Applications

We examine the production of light Higgs bosons associated with electroweak symmetry-breaking in an E 6 superstring model in Z→HZ* decays, in e + e − annihilation and in toponium decays. We find that the couplings of the lightest scalar Higgs boson [Formula: see text] in these models are very similar to those of the standard Higgs boson unless the pseudoscalar P 0 in the model has mass ≤M z . Possible new modes for Higgs boson production not found in the standard model include [Formula: see text] or [Formula: see text] and [Formula: see text] or (H + H − ), where [Formula: see text] is the second lightest scalar. We give simple analytic expressions for the Higgs boson masses and mixing angles in the limit that the extra Z′ gauge boson is heavy which clearly shows the production mechanisms that are favored for a given set of model parameters. The lower bound on the mass of the charged Higgs boson associated with the electroweak symmetry breaking is 53 GeV, independent of the Z′ boson mass or mixing; this bound is realized only for very small [Formula: see text] and P 0 masses. Toponium decays to [Formula: see text] and H + H − may exist at up to the per cent level for some model parameters. The dominant decay mode for [Formula: see text] could be [Formula: see text], if kinematically allowed, while the principal decays for [Formula: see text] could be [Formula: see text] or [Formula: see text] .