Abstract
Dark matter stability can result from a residual matter-parity symmetry surviving spontaneous breaking of an extended gauge symmetry. We propose the simplest scotogenic dark matter completion of the original SVS theory [1], in which the “dark sector” particles as well as matter-parity find a natural theoretical origin within the model. We briefly comment on its main features.
Highlights
The nature of dark matter remains mysterious, though a lot of progress has been made on what dark matter should not be [2]
From a theory point of view it would be desirable that the particle dark matter candidate should obey two requirements: 1. fit in a broder scheme accounting for other shortcomings of the standard model, 2. have its stability on cosmological scales naturally protected by a symmetry
Concerning the neutrino sector, the light active neutrino masses are produced by a radiative one-loop seesaw mechanism, thanks to the remnant M P discrete symmetry preserved after the spontaneous symmetry breaking (SSB) of the U(1)N gauge symmetry
Summary
The nature of dark matter remains mysterious, though a lot of progress has been made on what dark matter should not be [2]. When the gauge symmetry is extended, it can happen that there is a “dark symmetry” called matter-parity, that remains conserved after spontaneous symmetry breaking In this case the lightest odd-particle will be automatically stable and can play the role of dark matter. The theory is minimal, as it uses only particles already present in the original SVS theory to make up the “dark” sector, with the residual matter-parity resulting from the extended symmetry breaking dynamics.1 This way it provides an elegant origin for the scalar dark doublet introduced ad hoc in other dark matter constructions, of the Inert Higgs Doublet type [17,18,19,20,21].
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