Solar Neutrinos in 2011

I give an overview of the recent developments in the solar neutrino field. I focus on the Borexino detector, which has uncovered the solar neutrino spectrum below 5 MeV, providing new tests and confirmation for solar neutrino oscillations. I report on the updated measurements of the 8B solar neutrino flux by water Cherenkov and organic scintillator detectors. I review the precision measurement of the 7Be solar neutrino flux by Borexino and the search for its day-night asymmetry. I present Borexino’s latest result on the study of pep and CNO neutrinos. Finally, I discuss the outstanding questions in the field and future solar neutrino experiments. 1. Prelude In 2002, results from the SNO collaboration solved the long-standing solar neutrino problem by demon-strating that solar neutrinos oscillate, i.e. the flavor content of solar neutrinos detected on Earth is dif-ferent from their initial electron neutrino state when produced in the Sun [1]. Further measurements of the 8B solar neutrino flux by SNO [2] and Super-Kamiokande [3], as well as the results on reactor anti