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Flipping neutrinos keep astronomers guessing

发布时间:2019-03-07 04:04:11来源:未知点击:

By Hazel Muir A LONG-STANDING mystery about ghostly particles whizzing out of the Sun has taken another twist. Scientists have found that the number of “ordinary” neutrinos emerging varies as the Sun rotates. Neutrinos produced by nuclear reactions deep within the Sun stream out at almost the speed of light. Scientists had assumed that they emerge at a more or less constant rate. But neutrino detectors on Earth have only detected about half of the expected numbers. Neutrinos come in three types: electron, muon and tau. Nuclear reactions in the Sun create electron neutrinos,