Triplet Attraction




Strong evidence for the deconfinement of quarks comes, instead, from studying the production of charmonium - particles containing a heavy charm quark and antiquark - in nucleus-nucleus collisions. Some of the dilepton pairs seen in experiments come from the decay of charmonium. These charmonium particles (also called J/psi, chi and psi prime) have many properties that we are familiar with from the study of positronium, the bound state of an electron and positron.

A bound state consisting of a charmed quark and a charmed antiquark. A major impetus for the quark theory was the discovery in 1974 of the J/psi particle, a particle whose properties closely matched the predictions for charmonium.

Any of various elementary particles consisting of a charm quark and an antiquark.
ETYMOLOGY: From charm.

The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved.

See Also

Etheric Elements
Particles and Corpuscles
Table of Quantum Particles

Created by Dale Pond. Last Modification: Saturday January 15, 2011 02:47:02 MST by Dale Pond.