Article: Neutrino physics after the supernova.

Neutrino physics after the supernova

Neutrinos from supernova 1987A arebeginning to change some of physicists' ideas about those elusive but important particles. The latest aspect of this is the attempt to determine whether the neutrino has mass by calculating from the time of flight between the Large Magellanic Cloud and the earth. What seems to be the first such calculation to be published--by John N. Bahcall of the Institute for Advanced Study in Princeton, N.J., and Sheldon L. Glashow of Harvard University--appears in the April 2 NATURE. When they first appeared in physics, neutrinos were not thought to have mass. More recently some theories have wanted ...

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