Left-right model of Quark and Lepton masses without a scalar bidoublet.
We propose a left-right model of quarks and leptons based on the gauge group SU(3)(C)xSU(2)(L)xSU(2)(R)xU(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.
Brahmachari
Biswajoy
B
Theory Division, Saha Institute of Nuclear Physics, Block AF, Sector 1, Bidhannagar, Kolkata 700 064, India.
Ma
Ernest
E
Sarkar
Utpal
U