PT Journal
AU Herrero-Garcia, J
   Rius, N
   Santamaria, A
TI Higgs lepton flavour violation: UV completions and connection to neutrino masses
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2016
BP 084
EP 45pp
VL 11
IS 11
DI 10.1007/JHEP11(2016)084
LA English
DE Beyond Standard Model; Higgs Physics; Neutrino Physics
AB We study lepton violating Higgs (HLFV) decays, first from the effective field theory (EFT) point of view, and then analysing the different high-energy realizations of the operators of the EFT, highlighting the most promising models. We argue why two Higgs doublet models can have a BR(h -> tau mu) similar to 0:01, and why this rate is suppressed in all other realizations including vector-like leptons. We further discuss HLFV in the context of neutrino mass models: in most cases it is generated at one loop giving always BR (h -> tau mu) < 10(-4) and typically much less, which is beyond experimental reach. However, both the Zee model and extended left-right symmetric models contain extra SU(2) doublets coupled to leptons and could in principle account for the observed excess, with interesting connections between HLFV and neutrino parameters.
ER