DOI 10.1007/s100529900217
Implications of the precision data for very light Higgs Boson scenarios in 2HDM(II)
P.H. Chankowski1,2 - M. Krawczyk2 - J. Zochowski2
1 Theory Division, CERN, Geneva, Switzerland
2 Institute of Theoretical Physics, Warsaw University, Poland
Received: 8 June 1999 / Published online: 14 October 1999
Abstract
We present an up-to-date analysis of the constraints the precision data
impose on the (CP- conserving) Two Higgs Doublet Model of type II with
emphasis on the possible existence of very light neutral (pseudo)scalar
Higgs boson with mass below 20-30GeV. We show that even in the presence
of such light particles, the 2HDM(II) can describe
the electroweak data with the precision comparable to that given by the
SM.
Particularly interesting lower limits on the mass of the lighter
neutral
CP-even scalar h0 are obtained in the scenario with
light CP-odd Higgs boson A0 and large 
.
Copyright Springer-Verlag
