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Measuring all neutrino components is the most direct way to test the standardsolar model (SSM). Despite the great results obtained so far, importantquestions such as the solar metallicity remain open. A precise measurement ofthe solar pp chain and the CNO cycle would settle this controversy between high(HZ) and low (LZ) metallicity compositions of the Sun. Solar neutrinos allowthe determination of oscillation parameters, in particular the $\theta_{12}$mixing angle and, to a lesser degree the $\Delta m^2_{12}$ mass splitting.Furthermore the measurement of the electron neutrino survival probability Peeas a function of neutrino energy allows one to directly probe the MSW-LMAmechanism of neutrino oscillations In this work I will report the firstsimultaneous precision spectroscopic measurement of the complete pp-chain andits implications for both solar and neutrino physics with the Borexinodetector.

Recent results on pp-chain solar neutrinos with the Borexino detector