A_4-based neutrino masses with Majoron decaying dark matter

Details A_4-based neutrino masses with Majoron decaying dark matter A_4-based neutrino masses with Majoron decaying dark matter

2010-07-06

arxiv.org/abs/1007.0898v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 6 eps figures. Minor corrections. To appear in Phys. Rev. D

Scientific paper

We propose an A_4 flavor-symmetric SU(3)xSU(2)xU(1) seesaw model where lepton number is broken spontaneously. A consistent two-zero texture pattern of neutrino masses and mixing emerges from the interplay of type-I and type-II seesaw contributions, with important phenomenological predictions. We show that, if the Majoron becomes massive, such seesaw scenario provides a viable candidate for decaying dark matter, consistent with cosmic microwave background lifetime constraints that follow from current WMAP observations. We also calculate the sub-leading one-loop-induced decay into photons which leads to a mono-energetic emission line that may be observed in future X-ray missions such as Xenia.

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