Mahapatra, S and Narendra, Nimmala and Sahu, Narendra
(2020)
VERIFIABLE TYPE-II SEESAW AND DARK MATTER IN A GAUGED U(1)B−L MODEL.
arXiv.org.
Abstract
We propose a gauged U(1)B−L extension of the standard model (SM) to explain simultaneously the light neutrino masses and dark matter (DM). The generation of neutrino masses
occurs through a variant of type-II seesaw mechanism in which one of the scalar triplets
lies at the TeV scale yet have a large dilepton coupling, which paves a path for probing
this model at colliders. The gauging of U(1)B−L symmetry in a type-II seesaw framework
introduces B − L anomalies. Therefore we invoke three right handed neutrinos νRi
(i=1,2,3)
with B − L charges -4,-4,+5 to cancel the anomalies. We further show that the lightest one
among the three right handed neutrinos can be a viable DM candidate. The stability of DM
can be owed to a remnant Z2 symmetry under which the right handed neutrinos are odd
while all other particles are even. We then discuss the constraints on the model parameters
from observed DM abundance and the search at direct detection experiments.
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