A two-loop induced neutrino mass model, dark matter, and LFV processes → , and → In a Hidden Local (1) Symmetry
Takaaki Nomura (School of Physics, KIAS, Seoul, Republic of Korea); Hiroshi Okada (Asia Pacific Center for Theoretical Physics (APCTP), Pohang, Republic of Korea, Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea); Yuichi Uesaka (Faculty of Science and Engineering, Kyushu Sangyo University, Fukuoka, Japan)
We discuss a model based on a hidden gauge symmetry in which neutrino mass is induced at two-loop level by effects of interactions among particles in hidden sector and the Standard Model leptons. Since neutrino mass is suppressed by two-loop, its associate Yukawa couplings can be sizable and it would affect lepton flavor phenomenology. We analyze neutrino mass matrix, lepton flavor violating processes, electron/muon and dark matter annihilation cross section which are induced via interactions among Standard Model leptons and particles in hidden sector, and their interactions can be sizable in our scenario. Performing numerical analysis, we show expected ratios for these processes using allowed parameters which can fit the neutrino data and satisfy flavor constraints.
