Enhancement of h --> gamma gamma in the Two Higgs Doublet Model Type I

Details Enhancement of h --> gamma gamma in the Two Higgs Doublet Model Type I Enhancement of h --> gamma gamma in the Two Higgs Doublet Model Type I

2010-01-12

arxiv.org/abs/1001.1759v2

Phys.Lett.B696:447-453,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages. v2: Sign error in eq. (19) corrected. Results and figures for the IDM changed accordingly. Other minor corrections.

Scientific paper

10.1016/j.physletb.2011.01.003

We show that in the Two Higgs Doublet Model (THDM) Type I the partial decay width of h --> gamma gamma can be considerably larger than in Type II, due to light charged scalars with a mass about 100 GeV, which are not yet excluded in Type I. A possible enhancement of the width compared to the SM is analyzed for different Higgs potentials, subject to constraints from tree-level unitarity, vacuum stability and electroweak precision tests.

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