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Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters

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arxiv nucl-ex/0204009 v2 pith:QTHYI42U submitted 2002-04-19 nucl-ex astro-phhep-ex

classification nucl-exastro-phhep-ex
keywords neutrinonightactiveasymmetryenergymixingratesolar
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abstract

The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted $^8$B spectrum, the night minus day rate is $14.0% \pm 6.3% ^{+1.5}_{-1.4}%$ of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the $\nu_e$ asymmetry is found to be $7.0% \pm 4.9% ^{+1.3}_{-1.2}%$. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Estimating amplitude of matter density fluctuations in solar and supernova models using neutrino flavor evolution

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    SDA recovers density-fluctuation amplitudes from boundary neutrino flavor data in simplified solar and CCSN models, more reliably for the Sun and at high noise in CCSN.

  2. Two-sector leptogenesis in a two-Higgs-doublet model with spontaneous CP violation

    hep-ph 2025-09 reject novelty 4.0 of 10

    The paper proposes an A4-flavored two-Higgs-doublet model with two-sector leptogenesis and reports that a few-GeV dark fermion gives ΩDM/Ωb ~ 5 for M1 ~ 10^10 GeV.

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