Seasonal Modulation of the ${}^7$Be Solar Neutrino Rate in Borexino

Abstract

We detected the seasonal modulation of the ${}^7$Be 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 sinusoidal fit, the Lomb-Scargle and the Empirical Mode Decomposition techniques, which all yield results in excellent agreement.

arXiv comment11 palese, 13 figures

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Cited by in corpus (14)

• Experimental evidence of neutrinos produced in the CNO fusion cycle in the Sun
• Simultaneous Precision Spectroscopy of $pp$, ${}^7$Be, and $pep$ Solar Neutrinos with Borexino Phase-II
• Comprehensive geoneutrino analysis with Borexino
• Modulations of the Cosmic Muon Signal in Ten Years of Borexino Data
• Solar Neutrino Spectroscopy
• Time-integrated directional detection of dark matter
• Borexino results on neutrinos from the Sun and Earth
• Geoneutrinos and geoscience: an intriguing joint-venture
• Independent determination of the Earth's orbital parameters with solar neutrinos in Borexino
• Particle Identification at MeV Energies in JUNO
• Novel techniques for alpha/beta pulse shape discrimination in Borexino
• CYG$\nu$S: Detecting solar neutrinos with directional gas time projection chambers
• Sub-GeV Dark Matter Direct Detection with Neutrino Observatories
• Searching for beyond-Standard-Model solar neutrino interactions using directional detectors