The Recent Results of the Solar Neutrino Measurement in Borexino
Yusuke Koshio (for the Borexino collaboration)
TL;DR
This paper discusses recent solar neutrino measurements in Borexino, highlighting precise flux measurements, day/night effect analysis, and validation of the MSW-LMA oscillation model based on 153.62 ton-year data.
Contribution
It presents new high-precision measurements of solar neutrino flux and effects, confirming the MSW-LMA model with extensive data from Borexino.
Findings
7Be neutrino flux measured with better than 5% accuracy
Detection of day/night effect consistent with MSW-LMA model
Validation of solar neutrino oscillation parameters
Abstract
The recent released results of 153.62 ton year exposure of solar neutrino data in Borexino are here discussed. Borexino is a multi-purpose detector with large volume liquid scintillator, located in the underground halls of the Laboratori Nazionali del Gran Sasso in Italy. The experiment is running since 2007. The first realtime 7Be solar neutrino measurement has been released in 2008. Thanks to the precise detector calibration in 2009, the 7Be flux measurement has been reached with an accuracy better than 5%. The result related to the day/night effect in the Be energy region is also discussed. These results validate the MSW-LMA model for solar neutrino oscillation.
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Taxonomy
TopicsNeutrino Physics Research · Atmospheric Ozone and Climate · Dark Matter and Cosmic Phenomena