The Borexino experiment at the Gran Sasso Underground Laboratory

• Aldo Ianni (Laboratori Nazionali del Gran Sasso)

Room: H331 Abstract: Borexino at the Gran Sasso Laboratory is an unsegmented 300 tons liquid scintillator detector designed and built to search mainly for low energy (<1MeV) solar neutrinos. Borexino has already operated for ten years and achieved a number of remarkable results in MeV and sub-MeV (anti)neutrino searches, such as a 5% measurement of the 7Be solar neutrinos and observation of geo-neutrinos. In 2014, Borexino has detected the so-called proton-proton (pp) solar neutrinos. The production of these neutrinos is very slow and drives the evolution of the Sun in a timescale of billions of years. Being the average energy of pp neutrino equal to 267 keV, detection of these neutrinos in realtime is extremely difficult. The high level of radio-purity reached in Borexino has allowed to measure pp neutrinos at 10% level. In 2015, Borexino has measured geo-neutrinos with a 5sigma significance. In the talk the Borexino detector and its history since the early proposal in 1988 will be reported. A review of the main achievements in Borexino, including solar neutrinos, geo-neutrinos and rare events searches, will be presented. Next future perspectives with Borexino will be reviewed.