Journal
PHYSICAL REVIEW D
Volume 82, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.073008
Keywords
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Funding
- Spanish MICINN [FPA2008-00319/FPA, MULTIDARK CAD2009-00064]
- EU [UNILHC PITN-GA-2009-237920, MRTN-CT-2006-035505]
- Fundacao para a Ciencia e a Tecnologia [CFTP-FCT UNIT 777, POCI/81919/2007, CERN/FP/83503/2008, SFRH/BD/29642/2006]
- CSIC
- [Prometeo/2009/091]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/29642/2006, CERN/FP/83503/2008] Funding Source: FCT
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We propose an A(4) flavor-symmetric SU(3) circle times SU(2) circle times 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.
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