https://doi.org/10.1140/epjc/s10052-020-7968-9
Regular Article - Theoretical Physics
Neutrino phenomenology and dark matter in an 
flavour extended 
model
1
Department of Physics, IIT Hyderabad, Kandi, 502285, India
2
School of Physics, University of Hyderabad, Hyderabad, 500046, India
3
Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, 492015, India
4
Discipline of Physics, Indian Institute of Technology Indore, Indore, 453 552, India
* e-mail: rmsp@uohyd.ac.in
Received:
6
February
2020
Accepted:
24
April
2020
Published online:
14
May
2020
We present an 
flavor extended 
model for realization of eV scale sterile neutrinos, motivated by the recent experimental hints from both particle physics and cosmology. The framework considered here is a gauged extension of standard model without the introduction of right-handed neutrinos, where the gauge triangle anomalies are canceled with the inclusion of three exotic neutral fermions 
(
) with charges 
and 5. The usual Dirac Yukawa couplings between the SM neutrinos and the exotic fermions are absent and thus, the model allows natural realization of eV scale sterile-like neutrino and its mixing with standard model neutrinos by invoking flavor symmetry. We demonstrate how the exact tri-bimaximal mixing pattern is perturbed due to active-sterile mixing by analyzing 
case in detail. We also show the implication of eV scale sterile-like neutrino on various observables in neutrino oscillation experiments and the effective mass in neutrinoless double beta decay. Another interesting feature of the model is that one of three exotic fermions is required to explain eV scale phenomena, while other two fermions form stable dark matter candidates and their total relic density satisfy the observed 
limit of Planck data. We constrain the gauge parameters associated with U(1) gauge extension, using relic density and collider bounds.
© The Author(s), 2020
