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7Be Solar Neutrino Measurement with KamLAND

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arxiv 1405.6190 v2 pith:NDAGRYDZ submitted 2014-05-23 hep-ex astro-ph.SRnucl-ex

A. Gando , Y. Gando , H. Hanakago , H. Ikeda , K. Inoue , K. Ishidoshiro , H. Ishikawa , Y. Kishimoto
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M. Koga R. Matsuda S. Matsuda T. Mitsui D. Motoki K. Nakajima K. Nakamura A. Obata A. Oki Y. Oki M. Otani I. Shimizu J. Shirai A. Suzuki K. Tamae K. Ueshima H. Watanabe B.D. Xu S. Yamada Y. Yamauchi H. Yoshida A. Kozlov Y. Takemoto S. Yoshida C. Grant G. Keefer D.W. McKee A. Piepke T.I. Banks T. Bloxham S.J. Freedman B.K. Fujikawa K. Han L. Hsu K. Ichimura H. Murayama T. O'Donnell H.M. Steiner L.A. Winslow D. Dwyer C. Mauger R.D. McKeown C. Zhang B.E. Berger C.E. Lane J. Maricic T. Miletic J.G. Learned M. Sakai G.A. Horton-Smith A. Tang K.E. Downum K. Tolich Y. Efremenko Y. Kamyshkov O. Perevozchikov H.J. Karwowski D.M. Markoff W. Tornow J.A. Detwiler S. Enomoto K. Heeger M.P. Decowski (The KamLAND Collaboration)
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keywords solarfluxflavorkamlandneutrinoassumingkton-daymeasurement
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We report a measurement of the neutrino-electron elastic scattering rate of 862 keV 7Be solar neutrinos based on a 165.4 kton-day exposure of KamLAND. The observed rate is 582 +/- 90 (kton-day)^-1, which corresponds to a 862 keV 7Be solar neutrino flux of (3.26 +/- 0.50) x 10^9 cm^-2s^-1, assuming a pure electron flavor flux. Comparing this flux with the standard solar model prediction and further assuming three flavor mixing, a nu_e survival probability of 0.66 +/- 0.14 is determined from the KamLAND data. Utilizing a global three flavor oscillation analysis, we obtain a total 7Be solar neutrino flux of (5.82 +/- 0.98) x 10^9 cm^-2s^-1, which is consistent with the standard solar model predictions.

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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. Sensitivity of nEXO to $^{136}$Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter

    nucl-ex 2025-06 conditional novelty 6.0 of 10

    A new delayed-coincidence tag from 136Cs isomers could let the nEXO detector reject backgrounds down to 10^-9 and measure CNO solar neutrinos, the 7Be neutrino energy, and sub-MeV fermionic dark matter.

  2. 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.

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