Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-11-03
JHEP 0901:028,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 7 figures, JHEP published version (2009) + update of section 7 (reference to arXiv:0912.4496)
Scientific paper
10.1088/1126-6708/2009/01/028
We show that dark matter could be made of massive gauge bosons whose stability doesn't require to impose by hand any discrete or global symmetry. Stability of gauge bosons can be guaranteed by the custodial symmetry associated to the gauge symmetry and particle content of the model. The particle content we consider to this end is based on a hidden sector made of a vector multiplet associated to a non-abelian gauge group and of a scalar multiplet charged under this gauge group. The hidden sector interacts with the Standard Model particles through the Higgs portal quartic scalar interaction in such a way that the gauge bosons behave as thermal WIMPS. This can lead easily to the observed dark matter relic density in agreement with the other various constraints, and can be tested experimentally in a large fraction of the parameter space. In this model the dark matter direct detection rate and the annihilation cross section can decouple if the Higgs portal interaction is weak.
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