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.

Radiative seesaw-type mechanism of fermion masses and non-trivial quark mixing

“…[1][2][3][4]). In fact, considerable attention has already been paid in the literature to the S 3 [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] A 4 , S 4 [54][55][56][57][58][59][60][61][62], T 7 [63][64][65][66][67][68][69][70][71] and ∆ (27) [72][73][74][75][76][77][78][79][80]…”

Prediction of $h\;\to \;\gamma Z$ from $h\;\to \;\gamma \gamma $ at the LHC for the IMDS3model

“…This is not the case in the general 3HDM with an arbitrary vacuum alignment. This sort of model was put forward for the first time in [9] and the gg  h branching ratio in this context was considered in [10]. Here we will revisit this process with the more recent experimental data and also include the g  h Z process.…”

A model with two inert scalar doublets

“…The presence of two inert doublet implies in contributions for h 0 → γγ [44], and h 0 → Zγ [45]. In the latter paper it was obtained the best value for λ 5 , that fit the current data for h → γγ, when it is λ 5 = −0.4, in Fig.…”

“…For more details see Ref. [44]. We would like to stress that the existence of two inert doublets, and the flavor conservation in the neutral currents mediated by scalars are consequences of three ingredients: i) the S 3 symmetry, ii) the representation content of the fermion and scalar multiplets under S 3 , and, iii) the vacuum alignment.…”