Results from the Borexino Experiment
Timo Lewke (on behalf of the Borexino Collaboration)
TL;DR
Borexino is a highly pure liquid scintillator detector that has successfully measured low-energy solar neutrinos in real-time, confirming predictions of solar models and neutrino oscillation theories.
Contribution
It is the first experiment capable of real-time detection of low-energy solar neutrinos and simultaneously measuring neutrino oscillations in different energy regions.
Findings
Detection of solar 7Be neutrinos at 47±7 counts/day/100tons
Observation of 8B neutrinos at 0.26±0.06 counts/day/100tons
Neutrino fluxes agree with Standard Solar Model predictions
Abstract
Borexino is a low threshold liquid-scintillator detector for solar neutrinos located in the LNGS underground laboratory, Italy. Because of the ultra-high radio purity it is the first experiment able to do a real time analysis of the low energetic solar neutrinos. A detection of the solar 7Be neutrinos with a rate of 47+-7 counts/day/100tons can be reported (192 days of live time measurement). 8B neutrinos are observed with a rate of 0.26+-0.06 counts/day/100tons after 246 live days. All detected neutrino fluxes agree with the SSM predictions in case of the MSW-LMA oscillation solution. Borexino is the first experiment with the ablility to simultaneously measure solar neutrino oscillation in the vacuum-dominated and the matter-enhanced energy regions.
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Taxonomy
TopicsNeutrino Physics Research · Astrophysics and Cosmic Phenomena · Dark Matter and Cosmic Phenomena