7Be Solar Neutrino Measurement with KamLAND
Abstract
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.
Keywords
Cite
@article{arxiv.1405.6190,
title = {7Be Solar Neutrino Measurement with KamLAND},
author = {A. Gando and Y. Gando and H. Hanakago and H. Ikeda and K. Inoue and K. Ishidoshiro and H. Ishikawa and Y. Kishimoto and M. Koga and R. Matsuda and S. Matsuda and T. Mitsui and D. Motoki and K. Nakajima and K. Nakamura and A. Obata and A. Oki and Y. Oki and M. Otani and I. Shimizu and J. Shirai and A. Suzuki and K. Tamae and K. Ueshima and H. Watanabe and B. D. Xu and S. Yamada and Y. Yamauchi and H. Yoshida and A. Kozlov and Y. Takemoto and S. Yoshida and C. Grant and G. Keefer and D. W. McKee and A. Piepke and T. I. Banks and T. Bloxham and S. J. Freedman and B. K. Fujikawa and K. Han and L. Hsu and K. Ichimura and H. Murayama and T. O'Donnell and H. M. Steiner and L. A. Winslow and D. Dwyer and C. Mauger and R. D. McKeown and C. Zhang and B. E. Berger and C. E. Lane and J. Maricic and T. Miletic and J. G. Learned and M. Sakai and G. A. Horton-Smith and A. Tang and K. E. Downum and K. Tolich and Y. Efremenko and Y. Kamyshkov and O. Perevozchikov and H. J. Karwowski and D. M. Markoff and W. Tornow and J. A. Detwiler and S. Enomoto and K. Heeger and M. P. Decowski},
journal= {arXiv preprint arXiv:1405.6190},
year = {2015}
}
Comments
8 pages, 6 figures, submitted to Phys. Rev. C