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arXiv · 1007.0898

A_4-based neutrino masses with Majoron decaying dark matter

J. N. Esteves·F. R. Joaquim·A. S. Joshipura·J. C. Romao·M. A. Tortola·J. W. F. Valle
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Abstract

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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J. N. Esteves, F. R. Joaquim, A. S. Joshipura, J. C. Romao, M. A. Tortola, J. W. F. Valle. 2010-10-06. A_4-based neutrino masses with Majoron decaying dark matter. https://doi.org/10.1103/physrevd.82.073008

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