Prediction of $h\to \gamma Z$ from $h\to \gamma \gamma$ at LHC for the IMDS${}_3$ Model

Abstract

We consider the decays $h\to \gamma \gamma ,\gamma Z$ in the context of an extension of the standard model with two inert doublets and an additional $S_3$ symmetry. This model has contributions for these processes through new charged scalar-loops. Comparing our $h\to \gamma \gamma$ with the more precise available experimental data we can predict the behaviour of $h\to \gamma Z$ due that they depend on the same parameters, our estimation for this channel is 1.05 times the standard model value, but can be up to 1.16 if consider the $+1\sigma$ uncertainty from the $h\to \gamma \gamma$ data, and down to 0.96 if consider $-1\sigma$.

Comments: 14 pages, and 5 figures, new title, new phenomenological analysis, updated experimental data, new references, new Appendix and discussion added