https://doi.org/10.1140/epjc/s10052-016-4197-3
Regular Article - Theoretical Physics
Bounds on LFV Higgs decays in a vector-like lepton model and searching for doubly charged leptons at the LHC
1
Department of Physics, National Cheng-Kung University, Tainan, 70101, Taiwan
2
School of Physics, Korea Institute for Advanced Study, Seoul, 130-722, Republic of Korea
* e-mail: nomura@kias.re.kr
Received:
15
April
2016
Accepted:
10
June
2016
Published online:
24
June
2016
The Higgs-portal lepton flavor violation is studied in a vector-like lepton model. To avoid the constraints from rare 
decays, we introduce two triplet vector-like leptons, 
and 
. The resultant branching ratio for 
can be up to 
when the constraints from the invisible Z decays are applied. As a result, the signal strength for the 
channel has a 
deviation from the standard model prediction, while the muon 
is two orders of magnitude smaller than the data, and 
is of the order of 
. A predicted doubly charged lepton in pp collisions at 
TeV is analyzed, and it is found that the interesting production channels are 
. Both single and pair production cross sections of 
are comparable, and can be a few hundred fb. The main decay channels for the doubly charged lepton are 
, and for the heavy singly charged lepton they are 
. The numerical analysis is carried out with regard to 13 TeV LHC with 100 fb
luminosity.
© The Author(s), 2016
