A(4)-based neutrino masses with Majoron decaying dark matter

作者：Esteves J N^*; Joaquim F R; Joshipura A S; Romao J C; Tortola M A; Valle J W F

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2010, 82(7): 073008.

DOI：10.1103/PhysRevD.82.073008

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.

• 出版日期2010-10-12