In the one-singlet seesaw plus two-Higgs-doublet model, the neutrino Yukawa couplings can be expressed analytically through the measured neutrino masses, the PMNS matrix, and only two free parameters, phi' and lambda_D.
Progress in the parametrisation of the Neutrino sector
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abstract
Adding gauge singlets to the original Standard Model allows an explanation for the observed smallness of the neutrino masses using the seesaw mechanism. Following our plans presented in the last conference of this series we present the results for the non-standard setting, when the number of the singlets is smaller than the number of the SM generations.
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Seesaw neutrinos with one right-handed singlet field and a second Higgs doublet
In the one-singlet seesaw plus two-Higgs-doublet model, the neutrino Yukawa couplings can be expressed analytically through the measured neutrino masses, the PMNS matrix, and only two free parameters, phi' and lambda_D.