Neutrino Masses and A TeV Scale Seesaw Mechanism

Understand

A simple extension of the Standard Model providing TeV scale seesaw mechanism is presented.

• Beside the Standard Model particles and right-handed Majorana neutrinos, the model contains a singly charged scalar, an extra Higgs doublet and three vector like singly charged fermions.
• In our model, Dirac neutrino mass matrix raises only at the loop level.
• Small but non-zero Majorana neutrino masses come from integrating out heavy Majorana neutrinos, which can be at the TeV scale.