Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..apr.r2001m&link_type=abstract
American Physical Society, April Meeting, 2003, April 5-8, 2003 Philadelphia, Pennsylvania, MEETING ID: APR03, abstract #R2.001
Astronomy and Astrophysics
Astrophysics
Scientific paper
The Sudbury Neutrino Observatory (SNO) is a 1,000 tonne, heavy-water-based underground neutrino experiment developed and operated by a collaboration of scientists from Canada, the US and the UK. Previous measurements of solar neutrino fluxes were all smaller than predicted by solar model calculations, which had come to be known as the Solar Neutrino Problem - either the solar model calculations were incomplete or some of the electron neutrinos produced in the sun were changing to another flavor. To resolve this problem, SNO uses the neutrinos from ^8B decay in the Sun to search for direct evidence of neutrino flavor change by comparing one neutrino reaction sensitive only to solar electron neutrinos and others sensitive to all active neutrino types. Results from the multi-year observation program will be presented, showing clear evidence for flavor change of solar neutrinos. The implications of this result and future SNO measurements for particle physics, solar physics and astrophysics will be discussed.
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