https://doi.org/10.1140/epjp/s13360-024-05950-1
Regular Article
On lepton flavor violation and dark matter in Scotogenic model with trimaximal mixing
1
Department of Physics and Astronomical Science, Central University of Himachal Pradesh, 176215, Dharamshala, India
2
Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India
Received:
27
February
2024
Accepted:
27
December
2024
Published online:
16
January
2025
We examine the Scotogenic model employing the TM mixing matrix,
, for neutrinos and parameterize the Yukawa coupling matrix y based on the diagonalization condition for the neutrino mass matrix,
. Our investigation centers on analyzing the relic density of cold dark matter (
) and possible lepton flavor violation (LFV) in the model. In particular, we study coannihilation dynamics and LFV, in the model, considering various coannihilation scenarios including nonzero mass splitting between lightest sterile neutrinos. While analyzing, we have taken into consideration respective experimental constraints on
and LFV alongside neutrino oscillation data. Our study reveals that in both normal and inverted hierarchy of neutrino masses, splitting between masses of
and
can be up to
for the model to be in consonance with the above constraints. In the second part, we have extended the analysis incorporating extended magic symmetry in
enabling us to completely determine Yukawa coupling matrix (y). We observe a notable exclusion of the effective Majorana mass
parameter space by cosmological bound on sum of neutrino masses, particularly in the normal hierarchy, while inverted hierarchy scenario is excluded due to constraints coming from extended magic symmetry. These findings shed light on the interplay among the Scotogenic model, TM
mixing and extended magic symmetry, offering insights into the permitted parameter space and hierarchy exclusion.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.