Note on tree-level unitarity in the General Two Higgs Doublet Model

Details Note on tree-level unitarity in the General Two Higgs Doublet Model Note on tree-level unitarity in the General Two Higgs Doublet Model

2000-06-03

arxiv.org/abs/hep-ph/0006035v1

Phys.Lett.B490:119-124,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX, 2 PostScript figures

Scientific paper

10.1016/S0370-2693(00)00962-X

Tree-level unitarity constraints on the masses of the Higgs bosons in the general Two Higgs Doublet Model (THDM) are studied. We first consider the case where the Higgs potential is invariant under a discrete symmetry transformation, and derive strong constraints on the mass of the lightest CP-even Higgs boson ($M_h$) as a function of $\tan\beta$. We then show that the inclusion of the discrete symmetry breaking term weakens the mass bounds considerably. It is suggested that a measurement of $M_h$ and $\tan\beta$ may enable discrimination between the two Higgs potentials.

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