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

Autor: Laber-Smith, Caroline, Ahmetaj, A. A., Armstrong, Eve, Balantekin, A. Baha, Patwardhan, Amol V., Sanchez, M. Margarette, Wong, Sherry
Rok vydání: 2022
Předmět:
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevD.107.023013
Popis: 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.
Databáze: arXiv