Inference finds consistency between a neutrino flavor evolution model and Earth-based solar neutrino measurements

Abstract

We continue examining statistical data assimilation (SDA), an inference methodology, to infer solutions to neutrino flavor evolution, for the first time using real - rather than simulated - data. The model represents neutrinos streaming from the Sun's center and undergoing a Mikheyev-Smirnov-Wolfenstein (MSW) resonance in flavor space, due to the radially-varying electron number density. The model neutrino energies are chosen to correspond to experimental bins in the Sudbury Neutrino Observatory (SNO) and Borexino experiments, which measure electron-flavor survival probability at Earth. The procedure successfully finds consistency between the observed fluxes and the model, if the MSW resonance - that is, flavor evolution due to solar electrons - is included in the dynamical equations representing the model.

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Cited by in corpus (3)

• Determining the Density of the Sun with Neutrinos
• Constraining solar electron number density via neutrino flavor data at Borexino
• A $\nu$ look at the Sun: Probing the conditions of the solar core using ${}^8$B neutrinos