Eur. Phys. J. C 25, 297-305 (2002)
DOI: 10.1007/s10052-002-0980-4
Masses and couplings of the lightest Higgs bosons in ( M+1)SSM
U. Ellwanger and C. HugonieLaboratoire de Physique Théorique (Unité mixte de Recherche (UMR 8627).) , Université de Paris XI, 91405 Orsay Cedex, France
(Received: 7 September 1999 / Published online: 12 July 2002 )
Abstract
We study the upper limits on the mass of the lightest and second
lightest
CP
even Higgs bosons in the (
M+1)SSM, the
MSSM extended by a gauge
singlet. The
dominant two loop contributions to the effective potential are
included, which
reduce the Higgs masses by
GeV. Since the coupling
R of the
lightest Higgs scalar to gauge bosons can be small, we study
in detail the
relations between the masses and couplings of both lightest scalars.
We present
upper bounds on the mass of a "strongly" coupled Higgs (
R
>
1/2 ) as a
function of lower experimental limits on the mass of a "weakly"
coupled Higgs
(
R < 1/2). With the help of these results, the whole parameter
space of the
model can be covered by Higgs boson searches.
© Società Italiana di Fisica, Springer-Verlag 2002
