top quark


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top quark

n. Abbr. t
The flavor of quark that has a charge of + 2/3 , has a mass about 340,000 times that of an electron, and belongs to the third generation of elementary fermions. Also called truth quark.
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.

top′ quark`


n.
a hypothetical quark postulated to have electric charge ? times the electron's charge and the heaviest mass of all quarks.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.top quark - a hypothetical quark with a charge of +2/3 and a mass more than 100,000 times that of an electron
quark - (physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3; "quarks have not been observed directly but theoretical predictions based on their existence have been confirmed experimentally"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
In the near future, he envisions testing the technique on historical data that physicists now know contain milestone discoveries, such as the first detection in 1995 of the top quark, the most massive of all known elementary particles.
The fully hadronic final state is expected to result in two fat jets (each consisting of three subjets associated with the top quark) which are examined using the updated HEP Top Tagger 2 [18, 19].
The second part of the book details the history of the experiments leading to the discovery of the top quark, while the third part of the book describes the significance of the anomalous effects found in the data and the controversies they generated.
In 1992 I predicted a top quark mass of about 160 GeV, a b' quark mass of 65-80 GeV, and a t' quark at a whopping 2600 GeV.
Scientists from the four experiments involved-ATLAS, CDF, CMS and DZero-announced their joint findings on the mass of the top quark today at the Rencontres de Moriond international physics conference in Italy.
(9) There remained one missing member of quarks, the top quark. (10) New accelerators were built aiming to search for the top quark as one of their major research goals.
Fermilab collider experiments discover rare single top quark
At that instant of creation a series of decisions were made: the fine-structure constant was set to 1/137; the top quark was granted a mass 344,000 times greater than the electron; and the cosmological constant was set to a not-quite-zero value that allowed the universe to expand at just the right rate for us to exist.
Among the topics are four mistaken theses about evidence and how to correct them, highly probably versus highly probed hypotheses, agency and objectivity in the search for the top quark, and introspective evidence in psychology.
Since decay into the top quark channel is forbidden by energy conservation, one would expect [SIGMA]|[V.sub.ij]|[.sup.2] to be 2 with a three generation unitary CKM matrix.