# Physics at the LHC and beyond

29 September 2015 to 2 October 2015
DESY Hamburg
Europe/Berlin timezone

## $h \rightarrow \mu \tau$ as an indication for $S_4$ flavor symmetry

30 Sep 2015, 14:15
15m
Seminar room 4b (DESY Hamburg)

### Speaker

Mr Erik Schumacher (TU Dortmund)

### Description

Lepton flavor violating Higgs decays can arise in flavor symmetry models where the Higgs sector is responsible for both the electroweak and the flavor symmetry breaking. Here we advocate an $S_4$ three-Higgs-doublet model where tightly constrained flavor changing neutral currents are suppressed by a remnant $Z_3$ symmetry. A small breaking of this $Z_3$ symmetry can explain the $2.4\,\sigma$ excess of Higgs decay final states with a $\mu \tau$ topology reported recently by CMS if the new neutral scalars are light. The model also predicts sizable rates for lepton flavor violating Higgs decays in the $e\tau$ and $% e\mu$ channels because of the unifying $S_4$ flavor symmetry.

### Primary author

Mr Erik Schumacher (TU Dortmund)

### Co-authors

Mr Antonio Carcamo (UTFSM Valparaíso, Chile) Prof. Heinrich Päs (TU Dortmund) Mr Miguel Campos (MPIK Heidelberg)

 Slides