TeV-Scale Seesaw from a Multi-Higgs Model

by Prof. Naoyuki Haba (Tohoku University, Sendai)

Monday Feb 28, 2011, 2:30 PM → 3:00 PM Pacific/Honolulu

417A (Watanabe Hall)

We suggest new simple model of generating tiny neutrino masses through a TeV-scale seesaw mechanism without requiring tiny Yukawa couplings. This model is a simple extension of the standard model by introducing extra one Higgs singlet, and one Higgs doublet with a tiny vacuum expectation value. Experimental constraints, electroweak precision data and no large flavor changing neutral currents, are satisfied since the extra doublet only has a Yukawa interaction with lepton doublets and right-handed neutrinos, and their masses are heavy of order a TeV-scale. Since active light neutrinos are Majorana particles, this model predicts a neutrinoless double β decay.