dr Marcin Misiaszek, UJ

New results on solar neutrinos from Borexino

Solar neutrinos emitted by fusion reactions occurringin the Sun provide a unique and direct way to study theinterior of our star.The 50-year-long experimentaleffort to study solar neutrinos has been extremelyrewarding both in terms of solar physics, by confirmingthe Standard Solar Model (SSM) predictions, and interms of particle physics, by giving a substantial contribution to the discovery of neutrino flavour oscillations.The Borexino liquid scintillator (LS) neutrino observatory is devoted to performing neutrino observations, and is optimized for measurements in the low energy (sub-MeV) region of the solar neutrino spectrum. Borexino has performed the first direct, high-precision, wideband solar neutrino spectroscopy of the solar neutrino spectrums main components, including improving the knowledge of the CNO neutrino flux. Inthe presentation,the first simultaneous precision measurementof the interaction rates of solar neutrinos will be reported.