Theorists Identify Stable Tetraquark

Theorists Identify Stable Tetraquark
Valentin Flauraud/Keystone via AP

Two independent groups of theorists have shown for the first time that exotic particles made up of four quarks can exist for extended periods of time. Using different approaches, the researchers predict the existence of a stable “tetraquark” containing two heavy (bottom) quarks and two light antiquarks. They say that the particle could be detected in a few years' time at the LHCb experiment on the Large Hadron Collider at CERN.

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