The Borexino Solar Neutrino Experiment Cristiano Galbiati, Assistant Professor of Physics, Princeton University

The Borexino Solar Neutrino Detector at Gran Sasso Labs (Italy) is a low energy solar neutrino detector operating since 2007 at Gran Sasso, with 300 tons of liquid scintillator serving as an active target. The extremely low background achieved in the target allowed the first real time observation of low-energy solar neutrinos, below the natural radioactivity barrier (3.5 MeV). The simultaneous and real-time observatios of high-energy and low-energy solar neutrinos will allow Borexino to address some of the remaning open questions I solar neutrino physics, including the expected transition between vacuum-driven and matter-enhanced oscillations. I will report recent results form Borexino and their implications on our understanding of solarphysics and neutrino oscillations.