Research NewsPhysics

New Exotic Particle Points to Double Life for Gluons

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Science  12 Sep 1997:
Vol. 277, Issue 5332, pp. 1609
DOI: 10.1126/science.277.5332.1609

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The gluon has long been known as an insubstantial "force particle" that flits between quarks, conveying the strong force that binds them together into protons, neutrons, and other composite particles. Now there's evidence that gluons can act as constituents of matter as well, contributing mass just as quarks and electrons do. Two experiments, one at Brookhaven National Laboratory and the other at CERN, the European laboratory for particle physics, have just weighed in with glimpses of a short-lived hybrid particle consisting of a quark, an antimatter quark, and a gluon.