omega meson

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omega meson

n.
A neutral vector meson having a mass 1,532 times that of an electron and a mean lifetime of 7.7 × 10-23 second.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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NEW PARTICLE DISCOVERED -- The discovery of a new elementary particle, omega meson, made at the University of California's Lawrence Radiation Laboratory, and the finding of unidentified additional "particle systems" in the subatomic realm are believed to make it possible to push on in the next decade or two to a better explanation of how matter is put together.
Science past: from the issue of September 9, 1961
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