Eur. Phys. J. C 25, 103-111 (2002)
DOI: 10.1007/s10052-002-0972-4
Rare decay in a CP spontaneously broken two-Higgs doublet model
C.-S. Huang1, W. Liao2, Q.-S. Yan3 and S.-H. Zhu41 Institute of Theoretical Physics, Academia Sinica, P.O. Box 2735, Beijing 100080, P.R. China
2 The Abdus Salam International Centre for Theoretical Physics, P.O. Box 586, 34014 Trieste, Italy
3 Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918-4, Beijing 100039, P.R. China
4 Institut für Theoretische Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany
(Received: 15 October 2001 / Revised version: 5 March 2002 / Published online: 26 July 2002 )
Abstract
The Higgs boson
mass spectrum and couplings of the neutral Higgs bosons to the
fermions
are worked out
in a
CP
spontaneously broken
two-Higgs doublet model in the large
case.
The differential branching ratio, forward-backward asymmetry,
CP asymmetry and lepton polarization for
are computed. It is shown that the effects of neutral Higgs bosons
are quite significant when
is large. Especially,
the
CP violating normal polarization
PN
can be as large
as several percents.
© Società Italiana di Fisica, Springer-Verlag 2002