DOI: 10.1140/epjc/s2003-01141-5
Triple and quartic interactions of Higgs bosons in the two-Higgs-doublet model with CP-violation
M.N. Dubinin1 and A.V. Semenov21 Institute of Nuclear Physics, Moscow State University, 119992 Moscow, Russia
2 Laboratoire de Physique Theorique, LAPTH, Chemin de Bellevue, B.P. 110, 74941, Annecy-le-Vieux, Cedex, France
(Received: 13 June 2002 / Revised version: 20 November 2002 / Published online: 14 March 2003)
Abstract
We consider the two-Higgs-doublet model with explicit
CP-violation, where the effective Higgs potential
is not
CP-invariant at the tree level.
The three neutral Higgs bosons of the model are the mixtures
of
CP-even and
CP-odd bosons which exist in the
CP-conserving limit of the theory. The mass spectrum and
tree-level couplings of the neutral Higgs bosons to
gauge bosons and fermions are significantly
dependent on the parameters of the Higgs boson mixing matrix.
We calculate the Higgs-gauge boson, Higgs-fermion,
triple and quartic Higgs self-interactions in the
MSSM with explicit
CP-violation in the Higgs sector
and
CP-violating Yukawa interactions of the third generation
scalar quarks. In some regions of the MSSM parameter space
substantial changes of the self-interaction vertices
take place, leading to significant suppression or enhancement
of
the multiple Higgs boson production cross sections.
© Società Italiana di Fisica, Springer-Verlag 2003
