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Truly Minimal Left-Right Model of Quark and Lepton Masses

Biswajoy Brahmachari, Ernest Ma, Utpal Sarkar

hep-pharXiv:hep-ph/0301041

Abstract

We propose a left-right model of quarks and leptons based on the gauge group SU(3)C × SU(2)L × SU(2)R × U(1)B-L, where the scalar sector consists of only two doublets: (1,2,1,1) and (1,1,2,1). As a result, any fermion mass, whether it be Majorana or Dirac, must come from dimension-five operators. This allows us to have a common view of quark and lepton masses, including the smallness of Majorana neutrino masses as the consequence of a double seesaw mechanism.

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