Abstract
Neutrino oscillations in matter and in a magnetic field are investigated within models involving an extended Higgs sector. The left-right model containing a bidoublet and two triplets of Higgs fields (LRM) and the general two-Higgs-doublet model (GTHDM) are chosen by way of example. It is shown that the interaction of leptons with physical Higgs bosons can substantially change the pattern of oscillations in these models in relation to the predictions of the Standard Model (SM). Upper limits on the Yukawa coupling constants and on the Higgs boson masses are found in order to obtain maximum corrections to the SM solar-matter potential V SM. By using constraints on these parameters from the literature and those that are obtained here, it is possible to estimate corrections to V SM that come exclusively from charged Higgs bosons. The maximum value of these corrections is 40% of V SM within the LRM and 10% of V SM within the GTHDM. The entire body of information about the contributions of physical Higgs bosons to the solar-matter potential can be obtained by studying the Lorentz structure of the amplitudes for the reactions e − ν l → e − ν l′ at low energies.
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Translated from Yadernaya Fizika, Vol. 64, No. 11, 2001, pp. 2056–2072.
Original Russian Text Copyright © 2001 by Boyarkin, Bakanova.
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Boyarkin, O.M., Bakanova, T.I. Solar neutrinos in models involving an extended Higgs sector. Phys. Atom. Nuclei 64, 1971–1987 (2001). https://doi.org/10.1134/1.1423747
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DOI: https://doi.org/10.1134/1.1423747