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chi meson

[kahy] /kaɪ/
noun, Physics.
1.
a meson with a mass 6687 times that of the electron and a mean lifetime of approximately 1.5 X 10 -20 seconds.
Also called chi particle.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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chi particle in Science
chi particle
  (kī, kē)   
An electrically neutral meson having a mass 6,687 times that of the electron and a mean lifetime of approximately 1.5 × 10-20 seconds. See Table at subatomic particle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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