TY - JOUR

T1 - Seesaw model solutions of the solar neutrino problem

AU - Bludman, S. A.

AU - Kennedy, D. C.

AU - Langacker, P. G.

N1 - Funding Information:
We would like to thank Ray Davis, Jr., Ken Lande, Ming Xing Luo, Alfred Mann and Alycia Weinberger of the University of Pennsylvania and John Bahcall of the Institute for Advanced Study for their assistance and suggestions; and the Aspen Center for Physics and the Center for Particle Astrophysics for their support. This work was supported in part by the US Department of Energy under contract DOE-ACO2-76-ERO-3071.

PY - 1992/4/27

Y1 - 1992/4/27

N2 - We re-examine solutions to the solar neutrino oscillations, decaying neutrinos and a cooler center of the sun. Comparison of the Homestake and Kamiokande II observations implies that low-energy neutrinos are more suppressed than high-energy, disfavoring the large-mass adiabatic MSW resonance and allowing us to exclude non-standard solar models with a simple reduction of core temperature. Diagonal (sin22θ - 0.004-0.5, Δm2 {reversed tilde equals} 0.08-10 meV2), vertical large-angle (sin2 {reversed tilde equals} 0.6-0.9, Δm2 {reversed tilde equals} 0.08-2, 4-60 meV2), and part of the horizontal (sin22θ {reversed tilde equals} 0.02-0.6, Δm2 {reversed tilde equals} 80 meV2) MSW solutions are compatible with these data (meV = 10-3 eV). The present SAGE results disfavor non-standard solar models and the horizontal MSW solution. Assuming νe → νμ conversion, we show that seesaw models of neutrino masses imply mνμ = 0.3-9 meV, intermediate-scale symmetry breaking O(109-1012) GeV, and a τ-neutrino mass with cosmological ramifications in some cases and laboratory or atmospheric νμ - ντ oscillations. While seesaw predictions for neutrino masses are model-dependent and subject to large uncertainties, we prove that leptonic mixing angles are similar to quark mixings for a wide range of models. We also present two specific seesaw models compatible with electroweak neutral current and proton decay constraints, including radiative corrections to the seesaw predictions.

AB - We re-examine solutions to the solar neutrino oscillations, decaying neutrinos and a cooler center of the sun. Comparison of the Homestake and Kamiokande II observations implies that low-energy neutrinos are more suppressed than high-energy, disfavoring the large-mass adiabatic MSW resonance and allowing us to exclude non-standard solar models with a simple reduction of core temperature. Diagonal (sin22θ - 0.004-0.5, Δm2 {reversed tilde equals} 0.08-10 meV2), vertical large-angle (sin2 {reversed tilde equals} 0.6-0.9, Δm2 {reversed tilde equals} 0.08-2, 4-60 meV2), and part of the horizontal (sin22θ {reversed tilde equals} 0.02-0.6, Δm2 {reversed tilde equals} 80 meV2) MSW solutions are compatible with these data (meV = 10-3 eV). The present SAGE results disfavor non-standard solar models and the horizontal MSW solution. Assuming νe → νμ conversion, we show that seesaw models of neutrino masses imply mνμ = 0.3-9 meV, intermediate-scale symmetry breaking O(109-1012) GeV, and a τ-neutrino mass with cosmological ramifications in some cases and laboratory or atmospheric νμ - ντ oscillations. While seesaw predictions for neutrino masses are model-dependent and subject to large uncertainties, we prove that leptonic mixing angles are similar to quark mixings for a wide range of models. We also present two specific seesaw models compatible with electroweak neutral current and proton decay constraints, including radiative corrections to the seesaw predictions.

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U2 - 10.1016/0550-3213(92)90358-I

DO - 10.1016/0550-3213(92)90358-I

M3 - Article

AN - SCOPUS:0001425411

SN - 0550-3213

VL - 374

SP - 373

EP - 391

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 2

ER -