Distinguishing Higgs models in H -> b b-bar / H -> tau^+ tau^-

Details Distinguishing Higgs models in H -> b b-bar / H -> tau^+ tau^- Distinguishing Higgs models in H -> b b-bar / H -> tau^+ tau^-

2001-06-03

arxiv.org/abs/hep-ph/0106027v2

Phys.Lett. B515 (2001) 367-374

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 10 pages, 4 figures. Uses cite.sty. Comments and references added

Scientific paper

10.1016/S0370-2693(01)00866-8

We analyze the ratio of branching ratios R=BR(H->b b-bar)/BR(H->tau^+ tau^-) of Higgs boson decays as a discriminant quantity between supersymmetric and non-supersymmetric models. This ratio receives large renormalization-scheme independent radiative corrections in supersymmetric models at large \tan\beta, which are absent in the Standard Model or Two-Higgs-doublet models. These corrections are insensitive to the supersymmetric mass scale. A detailed analysis in the effective Lagrangian approach shows that, with a measurement of +-21% accuracy, the Large Hadron Collider can discriminate between models if the CP-odd Higgs boson mass is below 900 GeV. An e+e- Linear Collider at 500 GeV center of mass energy can discriminate supersymmetric models up to a CP-odd Higgs mass of ~ 1.8 TeV.

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