Eur. Phys. J. C 19, 463-469
DOI: 10.1007/s100520100585
The light Higgs window in the 2HDM at GigaZ
M. Krawczyk1, P. Mättig2 and J. Zochowski31 Institute of Theoretical Physics, University of Warsaw, Warsaw, 00-681, Poland
2 Weizmann Institute, Rehovot, Israel
3 Faculty of Physics, Bialystok University, Bialystok, Poland
(Received: 18 September 2000 / Revised version: 22 December 2000 / Published online: 15 March 2001 -© Springer-Verlag 2001)
Abstract
The sensitivity to a light Higgs boson in the general 2HDM (II),
with a mass below 40 GeV, is estimated for a
future e+e- Linear Collider operating
with a very high luminosity at the Z peak
(GigaZ). We consider possible Higgs boson production via
the Bjorken process, the (hA)
pair production,
the Yukawa process
,
and the decay
.
Although the discovery potential is considerably extended
compared to the current sensitivities, mainly from LEP,
the existence of a
h or A even with a mass of a
few GeV cannot be excluded with
two billion Z decays.
The need to study the very light Higgs scenario
at a e+e- Linear Collider running at several hundred GeV
and the LHC is emphasized.
© Società Italiana di Fisica, Springer-Verlag 2001
