charm quark
Americannoun
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A quark with a charge of + 2/3 and a charm of +1. Its mass is greater than that of the electron and greater than that of the up quark, down quark, and strange quark, but less than that of the bottom quark and top quark.
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Also called charmed quark
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See Table at subatomic particle
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Particle physics changed dramatically again in 1974 with the discovery of the heavier charm quark.
From Science Daily ● Sep. 2, 2026
Hadrons containing a charm quark and its antimatter partner, an anti-charm quark, occupy a region of the hadron spectrum with similar masses known as charmonium.
From Science Daily ● Sep. 2, 2026
Two sets of similar but heavier particles can pop into brief existence: the muon, muon neutrino, charm quark, and strange quark; and the tau, tau neutrino, top quark, and bottom quark.
From Science Magazine ● Mar. 27, 2024
The discovery was key because the ψ turned out to be made of a particle called the charm quark and its antimatter partner.
From Science Magazine ● Jul. 20, 2018
Emilio Segre Visual Archives/AIP/SPL Mary K. Gaillard's theoretical-physics achievements include predicting the mass of the charm quark.
From Nature ● Aug. 11, 2015
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
