Eur. Phys. J. C 19, 463-469
The light Higgs window in the 2HDM at GigaZM. Krawczyk1, P. Mättig2 and J. Zochowski3
1 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)
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