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Atmospheric and Solar Neutrinos with a Heavy Singlet

We follow a minimalistic approach to neutrino masses, by introducing a single heavy singlet $N$ into the standard model (or supersymmetric standard model) with a heavy Majorana mass $M$, which couples as a single right-handed neutrino in a Dirac fashion to leptons, and induces a single light see-saw...

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Detalles Bibliográficos
Autor principal: King, S.F.
Lenguaje:eng
Publicado: 1998
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(98)01055-7
http://cds.cern.ch/record/357912
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author King, S.F.
author_facet King, S.F.
author_sort King, S.F.
collection CERN
description We follow a minimalistic approach to neutrino masses, by introducing a single heavy singlet $N$ into the standard model (or supersymmetric standard model) with a heavy Majorana mass $M$, which couples as a single right-handed neutrino in a Dirac fashion to leptons, and induces a single light see-saw mass $m_{\nu}\sim 5\times 10^{-2} eV$, leaving two neutrinos massless. This trivial extension to the standard model may account for the atomospheric neutrino data via $\nu_{\mu}\to \nu_{\tau}$ oscillations with near maximal mixing angle eV^2$. In order to account for the solar neutrino data the model is extended to SUSY GUT/ string-inspired type models which can naturally yield an additional light tau neutrino mass $m_{\nu_{\tau}}\sim few \times 10^{-3} eV$ leading to oscillations with $\Delta m_{e1}^2\sim 10^{-5} eV^2$ and a mixing angle $\sin^2 2 \theta_1 \approx 10^{-2}$ in the correct range for the small angle MSW solution to the solar neutrino problem. The model predicts $\nu_{e L}\to (\sin similar angle but a larger splitting $\Delta m_{e2}^2 \sim 2.5\times 10^{-3} eV^2 $.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
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spelling cern-3579122023-03-14T19:57:12Zdoi:10.1016/S0370-2693(98)01055-7http://cds.cern.ch/record/357912engKing, S.F.Atmospheric and Solar Neutrinos with a Heavy SingletParticle Physics - PhenomenologyWe follow a minimalistic approach to neutrino masses, by introducing a single heavy singlet $N$ into the standard model (or supersymmetric standard model) with a heavy Majorana mass $M$, which couples as a single right-handed neutrino in a Dirac fashion to leptons, and induces a single light see-saw mass $m_{\nu}\sim 5\times 10^{-2} eV$, leaving two neutrinos massless. This trivial extension to the standard model may account for the atomospheric neutrino data via $\nu_{\mu}\to \nu_{\tau}$ oscillations with near maximal mixing angle eV^2$. In order to account for the solar neutrino data the model is extended to SUSY GUT/ string-inspired type models which can naturally yield an additional light tau neutrino mass $m_{\nu_{\tau}}\sim few \times 10^{-3} eV$ leading to oscillations with $\Delta m_{e1}^2\sim 10^{-5} eV^2$ and a mixing angle $\sin^2 2 \theta_1 \approx 10^{-2}$ in the correct range for the small angle MSW solution to the solar neutrino problem. The model predicts $\nu_{e L}\to (\sin similar angle but a larger splitting $\Delta m_{e2}^2 \sim 2.5\times 10^{-3} eV^2 $.We follow a minimalistic approach to neutrino masses, by introducing a single heavy singlet $N$ into the standard model (or supersymmetric standard model) with a heavy Majorana mass $M$, which couples as a single right-handed neutrino in a Dirac fashion to leptons, and induces a single light see-saw mass $m_{\nu}\sim 5\times 10^{-2} eV$, leaving two neutrinos massless. This trivial extension to the standard model may account for the atomospheric neutrino data via $\nu_{\mu}\to \nu_{\tau}$ oscillations with near maximal mixing angle $\theta_{23}\sim \pi/4$ and $\Delta m_{\mu \tau}^2 \sim 2.5\times 10^{-3} eV^2$. In order to account for the solar neutrino data the model is extended to SUSY GUT/ string-inspired type models which can naturally yield an additional light tau neutrino mass $m_{\nu_{\tau}}\sim few \times 10^{-3} eV$ leading to $\nu_{e L}\to (\cos \theta_{23}{\nu}_{\mu L} -\sin \theta_{23}{\nu}_{\tau L})$ oscillations with $\Delta m_{e1}^2\sim 10^{-5} eV^2$ and a mixing angle $\sin^2 2 \theta_1 \approx 10^{-2}$ in the correct range for the small angle MSW solution to the solar neutrino problem. The model predicts $\nu_{e L}\to (\sin \theta_{23}{\nu}_{\mu L} +\cos \theta_{23}{\nu}_{\tau L})$ oscillations with a similar angle but a larger splitting $\Delta m_{e2}^2 \sim 2.5\times 10^{-3} eV^2 $.We follow a minimalistic approach to neutrino masses, by introducing a single heavy singlet N into the standard model (or supersymmetric standard model) with a heavy Majorana mass M , which couples as a single right-handed neutrino in a Dirac fashion to leptons, and induces a single light see-saw mass m ν ∼5×10 −2 eV, leaving two neutrinos massless. This trivial extension to the standard model may account for the atomospheric neutrino data via ν μ → ν τ oscillations with near maximal mixing angle θ 23 ∼ π /4 and Δ m μτ 2 ∼2.5×10 −3 eV 2 . In order to account for the solar neutrino data the model is extended to SUSY GUT/ string-inspired type models which can naturally yield an additional light tau neutrino mass m ν τ ∼few×10 −3 eV leading to ν eL →(cos θ 23 ν μL −sin θ 23 ν τL ) oscillations with Δ m e 1 2 ∼10 −5 eV 2 and a mixing angle sin 2 2 θ 1 ≈10 −2 in the correct range for the small angle MSW solution to the solar neutrino problem. The model predicts ν eL →(sin θ 23 ν μL +cos θ 23 ν τL ) oscillations with a similar angle but a larger splitting Δ m e 2 2 ∼2.5×10 −3 eV 2 .hep-ph/9806440CERN-TH-98-208CERN-TH-98-208oai:cds.cern.ch:3579121998-06-23
spellingShingle Particle Physics - Phenomenology
King, S.F.
Atmospheric and Solar Neutrinos with a Heavy Singlet
title Atmospheric and Solar Neutrinos with a Heavy Singlet
title_full Atmospheric and Solar Neutrinos with a Heavy Singlet
title_fullStr Atmospheric and Solar Neutrinos with a Heavy Singlet
title_full_unstemmed Atmospheric and Solar Neutrinos with a Heavy Singlet
title_short Atmospheric and Solar Neutrinos with a Heavy Singlet
title_sort atmospheric and solar neutrinos with a heavy singlet
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(98)01055-7
http://cds.cern.ch/record/357912
work_keys_str_mv AT kingsf atmosphericandsolarneutrinoswithaheavysinglet