Unified supersymmetric model of naturally small Dirac neutrino masses and the axionic solution of the strong CP problem Original Research Article

Using the particle content of the fundamental 27 supermultiplet of E6, naturally small Dirac neutrino masses are obtained in the context of SU(3)C×SU(2)L×U(1)Y×U(1)χ, where U(1)χ comes from the decomposition E6→SO(10)×U(1)ψ, then SO(10)→SU(5)×U(1)χ. New observable consequences are predicted at the TeV scale. An axionic solution of the strong CP problem may be included at no extra cost.