1,298 research outputs found
Vanishing Higgs Quadratic Divergence in the Scotogenic Model and Beyond
It is shown that the inherent quadratic divergence of the Higgs mass
renormalization of the standard model may be avoided in the well-studied
scotogenic model of radiative neutrino mass as well as other analogous
extensions.Comment: 6 pages, 2 figure
Radiative Origin of All Quark and Lepton Masses through Dark Matter with Flavor Symmetry
The fundamental issue of the origin of mass for all quarks and leptons
(including Majorana neutrinos) is linked to dark matter, odd under an exactly
conserved Z(2) symmetry which may or may not be derivable from an U(1) gauge
symmetry. The observable sector interacts with a proposed dark sector which
consists of heavy neutral singlet Dirac fermions and suitably chosen new
scalars. Flavor symmetry is implemented in a renormalizable context with just
the one Higgs doublet of the standard model in such a way that all observed
fermions obtain their masses radiatively through dark matter.Comment: 12 pages, 4 figures, version to appear in PR
Radiative Scaling Neutrino Mass and Warm Dark Matter
A new and radical scenario of the simple 2006 model of radiative neutrino
mass is proposed, where there is no seesaw mechanism, i.e. neutrino masses are
not inversely proportional to some large mass scale, contrary to the prevalent
theoretical thinking. The neutral singlet fermions in the loop have masses of
order 10 keV, the lightest of which is absolutely stable and the others are
very long-lived. All are components of warm dark matter, which is a possible
new paradigm for explaining the structure of the Universe at all scales.Comment: 10 pages, 2 figure
Inception of Self-Interacting Dark Matter with Dark Charge Conjugation Symmetry
A new understanding of the stability of self-interacting dark matter is
pointed out, based on the simplest spontaneously broken Abelian gauge
model with one complex scalar and one Dirac fermion. The key is the imposition
of dark charge conjugation symmetry. It allows the possible existence of two
stable particles: the Dirac fermion and the vector gauge boson which acts as a
light mediator for the former's self-interaction. Since this light mediator
does not decay, it avoids the strong cosmological constraints recently obtained
for all such models where the light mediator decays into standard-model
particles.Comment: 9 pages, no figure, title modified, references adde
Soft Symmetry Breaking and Cobimaximal Neutrino Mixing
I propose a model of radiative charged-lepton and neutrino masses with
symmetry. The soft breaking of to lepton triality is accomplished
by dimension-three terms. The breaking of by dimension-two terms allow
cobimaximal neutrino mixing to be realized with only very small finite calculable
deviations from the residual lepton triality. This construction solves a
long-standing technical problem inherent in renormalizable models since
their inception.Comment: 8 pages, 4 figure
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