open access

https://hdl.handle.net/2115/57767

Revisiting discrete dark matter model: theta(13) ≠ 0 and v(R) dark matter

英語

Discrete and Finite Symmetries

2014-10-30

Springer

Journal of high energy physics

2014(10)

183

We revisit the discrete dark matter model with the A(4) flavor symmetry originally introduced by M.Hirsch et. al. We show that radiative corrections can lead to non-zero theta(13) and the non-zero mass for the lightest neutrino. We find an interesting relation among neutrino mixing parameters and it indicates the sizable deviation of s(23) from the maximal angle s(23)(2) = 1/2 and the degenerate mass spectrum for neutrinos. Also we study the possibilities that the right-handed neutrino is a dark matter candidate. Assuming that the thermal freeze-out explains observed dark matter abundance, TeV-scale right-handed neutrino and flavored scalar bosons are required. In such a case, the flavor symmetry plays an important role for the suppression of lepton flavor violating processes as well as for the stability of dark matter. We show that this scenario is viable within currently existing constraints from collider, low energy experiments and cosmological observations.

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Creative Commons Attribution 4.0 International

1029-8479