Dark matter in the supersymmetric radiative seesaw model with an anomalous U(1) symmetry

作者：Suematsu Daijiro^*; Toma Takashi

来源：Nuclear Physics B, 2011, 847(3): 567-589.

DOI：10.1016/j.nuclphysb.2011.02.007

The existence of an anomalous U(1) symmetry is shown to play a crucial role in the supersymmetric radiative seesaw model for neutrino masses. It explains the smallness of some couplings related to neutrino mass generation in a favorable way in addition to cause the hierarchical structure of Yukawa couplings of quarks and leptons. If it is spontaneously broken to a Z(2) subgroup, this Z(2) symmetry can make a lifetime of the lightest field with its odd parity extremely long. Thus, the model has an additional dark matter candidate other than the lightest neutralino, which appears in the R-parity conserved MSSM. We discuss the nature of dark matter by taking account of its relation to the neutrino mass generation and the lepton flavor violation.

• 出版日期2011-6-21