The Higgs decay rate to two photons in a model with two fermiophobic-Higgs doublets

Abstract

We consider a three Higgs doublet model with an $S_3$ symmetry in which beside the SM-like doublet there are two fermiophobic doublets. Due to the new charged scalars there is an enhancement in the two-photon decay while the other channels have the same decay widths that the SM neutral Higgs. The fermiophobic scalars are mass degenerated unless soft terms breaking the $S_3$ symmetry are added.

typos were corrected, the figures have been modified and the conclusions were increased. Still contains 15 pages, 2 figures

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• Natural Flavour Conservation in a three Higg-doublet Model
• Fermiophobic light Higgs boson in the type-I two-Higgs-doublet model
• Prediction of $h\to \gamma Z$ from $h\to \gamma \gamma$ at LHC for the IMDS${}_3$ Model