PT Journal
AU Cepedello, R
   Hirsch, M
   Rocha-Moran, P
   Vicente, A
TI Minimal 3-loop neutrino mass models and charged lepton flavor violation
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2020
BP 067
EP 37pp
VL 08
IS 8
DI 10.1007/JHEP08(2020)067
LA English
DE Beyond Standard Model; Neutrino Physics
AB We study charged lepton flavor violation for the three most popular 3-loop Majorana neutrino mass models. We call these models "minimal" since their particle content correspond to the minimal sets for which genuine 3-loop models can be constructed. In all the three minimal models the neutrino mass matrix is proportional to some powers of Standard Model lepton masses, providing additional suppression factors on top of the expected loop suppression. To correctly explain neutrino masses, therefore large Yukawa couplings are needed in these models. We calculate charged lepton flavor violating observables and find that the three minimal models survive the current constraints only in very narrow regions of their parameter spaces.
ER