title: Left-right model of Quark and Lepton masses without a scalar bidoublet.
abstract: 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.
authors.affiliation: Theory Division, Saha Institute of Nuclear Physics, Block AF, Sector 1, Bidhannagar, Kolkata 700 064, India.
authors.forename: Biswajoy
authors.initials: B
authors.lastname: Brahmachari
authors.forename: Ernest
authors.initials: E
authors.lastname: Ma
authors.forename: Utpal
authors.initials: U
authors.lastname: Sarkar