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top quark

noun, Physics.
a heavy quark having electric charge 2/3 times the elementary charge.
Also called t quark, truth quark.
Origin of top quark
1975-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for top quark
  • In this it will resemble the top quark, the latest fundamental particle to have been detected.
  • One, which has been around for a while but doesn't seem to be going away, is a forward-backward asymmetry in top quark production.
  • The top quark's lifetime is another interesting feature.
  • Since the discovery of the top quark, physicists have been scrutinizing every detail of this heavyweight particle.
  • It is a space for art exhibitions, chamber music concerts and where the top quark and big bang are debated over coffee.
  • The detection of single top quarks offers a means of measuring the top quark's coupling to the bottom quarks.
  • The detector will also be used for studies of top quark decays and supersymmetry searches.
  • They can do this by examining the decay products of the top quark pair.
top quark in Science
top quark
A quark with a charge of +2/3. Its mass is larger than that of all the other quarks and is about 360,000 times that of the electron. See Table at subatomic particle.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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