Quark quartet forms exotic particle

Existence of strange stuff confirmed in data from giant particle collider

By Stephen Ornes, 09:36 AM April 29, 2014

Particles called quarks are important building blocks of matter. They're usually found stuck together as triples or pairs to form bigger particles like the protons and neutrons that make up the core of an atom. Now scientists say quarks come in quartets, too. A new study confirms the existence of a strange kind of particle made from a cluster of four quarks.

More than 10 years ago, researchers suggested that such a foursome could exist. But they lacked the data needed to confirm this. Now scie...

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