Retrospect of GALLEX/GNO

Details Retrospect of GALLEX/GNO Retrospect of GALLEX/GNO

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jphcs.120e2013k&link_type=abstract

Journal of Physics: Conference Series, Volume 120, Issue 5, pp. 052013 (2008).

Physics

6

Scientific paper

After the completion of the gallium solar neutrino experiments at the Laboratori Nazionali del Gran Sasso (GALLEX, GNO), we shortly summarize the major achievements. Among them are the first observation of solar pp-neutrinos and the recognition of a substantial (40%) deficit of sub-MeV solar neutrinos that called for Ve transformations enabled by non-vanishing neutrino masses. We also inform about a recent complete re-analysis of the GALLEX data evaluation and reflect on the causes for the termination of GNO. From our gallium data we extract the e-e survival probability Pee for pp-neutrinos after subtraction of the 8B and 7Be contributions based on the experimentally determined 8B- (SNO/SK) and 7Be-(Borexino) neutrino fluxes as Pee(pp only) = 0.52 ± 0.12.

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