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arXiv · 1308.6630

A 331 WIMPy Dark Radiation Model

Chris Kelso·C. A. de S. Pires·Stefano Profumo·Farinaldo S. Queiroz·P. S. Rodrigues da Silva
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Abstract

Recent observations suggest that the number of relativistic degrees of freedom in the early universe might exceed what is predicted in the standard cosmological model. If even a small, percent-level fraction of dark matter particles are produced relativistically, they could mimic the effect of an extra realistic species at matter-radiation equality while obeying BBN, CMB and Structure Formation bounds. We show that this scenario is quite naturally realized with a weak-scale dark matter particle and a high-scale ``mother'' particle within a well motivated 3-3-1 gauge model, which is particularly interesting for being consistent with electroweak precision measurements, with recent LHC results, and for offering a convincing explanation for the number of generations in the Standard Model.

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Chris Kelso, C. A. de S. Pires, Stefano Profumo, Farinaldo S. Queiroz, P. S. Rodrigues da Silva. 2014-02-28. A 331 WIMPy Dark Radiation Model. https://doi.org/10.1140/epjc%2Fs10052-014-2797-3

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