The light Higgs window in the 2HDM at GigaZ

Details The light Higgs window in the 2HDM at GigaZ The light Higgs window in the 2HDM at GigaZ

2000-09-17

arxiv.org/abs/hep-ph/0009201v1

Eur.Phys.J.C19:463-469,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file, 11 pages, 6 ps figures

Scientific paper

10.1007/s100520100585

The sensitivity to a light Higgs boson in the general 2HDM (II), with a mass below 40 GeV, is estimated for an future e+e- linear collider operating with very high luminosity at the Z peak (GigaZ). We consider a possible Higgs boson production via the Bjorken process, the (hA) pair production, the Yukawa process Z -> b {\bar b} h(A), -> tau {\bar tau} h(A), and the decay Z ->h(A)+gamma. 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 linear e+e- collider running at several hundred GeV and the LHC is emphasised.

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