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The Solar Neutrino Problem

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Description: Original article by Bruce Scott, updated in 1998 by John Bahcall.
2008: The Solar Neutrino Problem is now considered solved, but I have yet to get a new page on this subject written up.  Click Fusion reactions in the core of the Sun produce a huge flux of neutrinos.  These neutrinos can be detected on Earth using large underground detectors, and the flux measured to see if it agrees with theoretical calculations based upon our understanding of the workings of the Sun and the details of the Standard Model (SM) of particle physics.  The measured flux is roughly one half of the flux expected from theory.  The cause of the deficit is a mystery.  Is our particle physics wrong?  Is our model of the Solar interior wrong?  Are the experiments in error?  This is the "Solar Neutrino Problem".
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activated: 04-Aug-1987
last updated: 07-May-2013
expires: 31-Jul-2014