The Higgs decay rate to two photons in a model with two fermiophobic-Higgs doublets
H. C\'ardenas, A. C. B. Machado, V. Pleitez, J.-Alexis Rodriguez
TL;DR
This paper explores a three Higgs doublet model with an $S_3$ symmetry, showing how new charged scalars enhance the Higgs to two-photon decay rate without affecting other decay channels.
Contribution
It introduces a novel three Higgs doublet model with $S_3$ symmetry, analyzing the impact of fermiophobic scalars on Higgs decay rates, especially the two-photon channel.
Findings
Enhanced Higgs to two-photon decay rate due to charged scalars
Other Higgs decay channels remain similar to the Standard Model
Fermiophobic scalars are mass degenerated unless symmetry-breaking terms are added
Abstract
We consider a three Higgs doublet model with an 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 symmetry are added.
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