Universal seesaw from left-right and Peccei-Quinn symmetry breaking

To generate the lepton and quark masses in the left-right symmetric models, we can consider a universal seesaw scenario by integrating out heavy fermion singlets which have the Yukawa couplings with the fermion and Higgs doublets. The universal seesaw scenario can also accommodate the leptogenesis with Majorana or Dirac neutrinos. We show that the fermion singlets can obtain their heavy masses from the Peccei-Quinn symmetry breaking. (C) 2011 Elsevier B.V. All rights reserved.