Unitarity constraints on scalar parameters of the Standard and Two Higgs Doublets Model

Details Unitarity constraints on scalar parameters of the Standard and Two Higgs Doublets Model Unitarity constraints on scalar parameters of the Standard and Two Higgs Doublets Model

2000-12-28

arxiv.org/abs/hep-ph/0012353v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, latex, 1 ps figures. Based on hep-ph/0006035. To be published in the proceedings of: Noncommutative Geometry, Supers

Scientific paper

Unitarity constraints on the scalar parameters both for the Standard Model and the general Two Higgs Doublet Model (THDM) are examined. In the case of the THDM with an exact discrete symmetry transformation, we show that the mass of the lightest CP-even Higgs boson ($M_h$) and $\tan\beta$ are strongly correlated and consequently a strong lower bound can be put on $M_h$ for large $\tan\beta$. It is also shown that the inclusion of the discrete symmetry breaking term relaxes the aforementioned correlation.

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