Abstract
We consider a model for cold dark matter, which combines a real scalar singlet and a real scalar SU(2)L triplet field, both of which are residing in the odd representation of a global Z2 symmetry. The parameter space of the model is constrained by the inferred dark matter abundance from the WMAP and Planck data, the most recent results from the direct dark matter search experiment LUX, the Z boson decay width from LEP-I and perturbativity of the coupling parameters. The phenomenology of the remaining parameter space is studied. We find that the model allows for DM masses near the electroweak scale and a variety of decay scenarios.
Highlights
One of the most astounding revelations of the twentieth century for our understanding of the Universe was the discovery of non-baryonic dark matter [1, 2], which is about five times more abundant than baryonic matter
In this model an additional singlet and SU(2)L triplet field reside in the odd representation of a global Z2 symmetry
We investigated the constraints from WMAP and Planck data, the direct search experiment LUX, LEP-I and perturbativity on the model parameter space
Summary
One of the most astounding revelations of the twentieth century for our understanding of the Universe was the discovery of non-baryonic dark matter [1, 2], which is about five times more abundant than baryonic matter. Supersymmetry is invoked as a principle, where R-parity is taken as the conserved symmetry In this case the lightest supersymmetric particle would be the dark matter candidate and a relation between supersymmetry and dark matter is claimed to exist. The simplest candidate for dark matter is given by a real scalar SU(2)L-triplet field, as presented and studied in Refs. This leads to three distinct scenarios, namely the singlet, the triplet and the mixed scenario, which will be discussed in separate subsections.
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