• Renormalization of seesaw neutrino masses in the standard model with two-Higgs doublets

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      https://www.ias.ac.in/article/fulltext/pram/054/02/0235-0246

    • Keywords

       

      Neutrino masses; radiative corrections; seesaw formula

    • Abstract

       

      Using the theoretical ambiguities inherent in the seesaw mechanism, we derive the new analytic expressions for both quadratic and linear seesaw formulae for neutrino masses at low energies, with either up-type quark masses or charged lepton masses. This is possible through full radiative corrections arising out of the renormalizations of the Yukawa couplings, the coefficients of the neutrino-mass-operator in the standard model with two-Higgs doublets, and also the QCD-QED rescaling factors below the top-quark mass scale, at one-loop level. We also investigate numerically the unification of top-b-τ Yukawa couplings at the scale M1=0.59×108 GeV for a fixed value of tan β=58.77, and then evaluate the seesaw neutrino masses which are too large in magnitude to be compatible with the presently available solar and atmospheric neutrino oscillation data. However, if we consider a higher but arbitrary value of M1=0.59×1011 GeV, the predictions from linear seesaw formulae with charged lepton masses, can accommodate simultaneousely both solar atmospheric neutrino oscillation data.

    • Author Affiliations

       

      N Nimai Singh1 2 S Biramani Singh1

      1. Physics Department, Gauhati University, Guwahati - 781 014, India
      2. Department of Physics and Astronomy, University of Southampton, Highfield, Southampton - S017 1BJ, UK
    • Dates

       
  • Pramana – Journal of Physics | News

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