Left-Right Symmetry: from Majorana to Dirac

Understand

Probing the origin of neutrino mass by disentangling the seesaw mechanism is one of the central issues of particle physics.

• We address it in the minimal left-right symmetric model and show how the knowledge of light and heavy neutrino masses and mixings suffices to determine their Dirac Yukawa couplings.
• This in turn allows one to make predictions for a number of high and low energy phenomena, such as decays of heavy neutrinos, neutrinoless double beta decay, electric dipole moments of charged leptons and neutrino transition moments.
• We also discuss a way of reconstructing the neutrino Dirac Yukawa couplings at colliders such as the LHC.