Esteves, J. N. ; Joaquim, F. R. ; Joshipura, A. S. ; Romão, J. C. ; Tórtola, M. A. ; Valle, J. W. F. (2010) A4-based neutrino masses with Majoron decaying dark matter Physical Review D - Particles, Fields, Gravitation and Cosmology, 82 (7). 073008_1-073008_8. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v82/i7/e073008
Related URL: http://dx.doi.org/10.1103/PhysRevD.82.073008
Abstract
We propose an A4 flavor-symmetric SU(3)⊗SU(2)⊗U(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 subleading one-loop-induced decay into photons which leads to a monoenergetic emission line that may be observed in future x-ray missions such as Xenia.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 67616 |
| Deposited On: | 31 Oct 2011 05:29 |
| Last Modified: | 31 Oct 2011 05:29 |
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