DOI 10.1007/s100520000347
Production of scalar Higgs and pseudoscalar Higgs
in multi-Higgs doublet models
at
colliders
Eri Asakawa1 - Jun-ichi Kamoshita2 - Akio Sugamoto2 - Isamu Watanabe3
1 Graduate School of Humanities and Sciences,
Ochanomizu University,
1-1 Otsuka 2-chome, Bunkyo, Tokyo 112-8610, Japan
2 Department of Physics, Ochanomizu University,
1-1 Otsuka 2-chome, Bunkyo, Tokyo 112-8610, Japan
3 Akita Keizaihoka University Junior College,
46-1 Morisawa, Sakura, Shimokita-te, Akita 010-8515, Japan
Received: 16 December 1999
/ Revised version: 30 January 2000
/
Published online: 6 April 2000
- © Springer-Verlag 2000
Abstract
We present the effects of heavy CP-even (H) and CP-odd
(A)
Higgs bosons on the production cross section of the process
at the energy around
the
mass poles of the Higgs bosons.
It is found that interference between H and A with
small mass gap, as well as the ones between Higgs bosons
and
continuum, contributes to the cross section, if the photon
beams
are polarized and if we observe the helicity of the top quarks.
It is demonstrated in the framework of the minimal supersymmetric
extension of the standard model that the H and A contributions
can be sizable at future
colliders for small values
of
.
The methods to measure the CP-parity of the Higgs boson are
also
presented.
The statistical significance of detecting the Higgs signals
and
measuring the Higgs CP-parity is evaluated.
Copyright Società Italiana di Fisica, Springer-Verlag 2000
