期刊
ASTROPARTICLE PHYSICS
卷 92, 期 -, 页码 21-29出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.astropartphys.2017.04.004
关键词
Solar neutrinos; Neutrino oscillations; Liquid scintillators detectors; Low background detectors
资金
- INFN (Italy)
- NSF (USA)
- BMBF
- DFG
- HGF
- MPG (Germany)
- RFBR (Russia) [16-02-01026 A, 15-02-02117 A, 16-29-13014 ofi-m, 17-02-00305 A]
- NCN Poland [UMO-2013/10/E/ST2/00180]
- Laboratory Nazionali del Gran Sasso (Italy)
- Division Of Physics
- Direct For Mathematical & Physical Scien [1413031, 1506378] Funding Source: National Science Foundation
We present the evidence for the seasonal modulation of the Be-7 neutrino interaction rate with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. The period, amplitude, and phase of the observed time evolution of the signal are consistent with its solar origin, and the absence of an annual modulation is rejected at 99.99% C.L. The data are analyzed using three methods: the analytical fit to event rate, the Lomb-Scargle and the Empirical Mode Decomposition techniques, which all yield results in excellent agreement. (C) 2017 Elsevier B.V. All rights reserved.
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