Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-07-31
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 13 pages, 5 figures. Improved text, added references, appendix removed. Version to appear in PLB
Scientific paper
We study the Higgs-boson decays h0 -> b \bar{b}, h0 -> \gamma \gamma and h0 -> \gamma Z within the framework of the Two Higgs Doublet Model (THDM) in the context of the decoupling regime, together with tree level unitarity constraints. We show that when the light CP-even Higgs boson of the THDM mimics the Standard-Model Higgs boson, not only the one-loop effects to h0 -> {\gamma \gamma ,\gamma Z} but also the one-loop contribution to h0 -> b \bar{b} can be used to distinguish between THDM and SM. The size of the quantum effects in h0 -> b \bar{b} are of the same order as in h0 -> {\gamma \gamma ,\gamma Z} and can reach 25% in both cases.
Arhrib Abdesselam
Hollik Wolfgang
Penaranda Siannah
Peyranere Michel Capdequi
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