Speaker
Prof.
Daijiro Suematsu
(Kanazawa University)
Description
We discuss a supersymmetric extension of the radiative seesaw model for neutrino masses. The model can induce the tri-bimaximal neutrino mixing and have two dark matter candidates. One of them is the lightest neutralino appeared in the $R$-parity conserved MSSM. The other one is a right-handed neutrino with mass of O(1) TeV. The latter one is metastable and its longevity is guaranteed by a $Z_2$ subgroup of anomalous U(1)$_X$ gauge symmetry, which forbids the neutrino mass generation at tree level. The flavour structure causing both the tri-bimaximal mixing and the smallness of neutrino mass eigenvalues may be partially related to this anomalous U(1)$_X$. We study the phenomenology of the model such as the dark matter relic abundance, the lepton flavor violating processes and also the direct and indirect searches of dark matter.
Author
Prof.
Daijiro Suematsu
(Kanazawa University)
Co-authors
Takashi Toma
(Kanazawa University)
Tetsuro Yoshida
(Kanazawa University)
