Illustration of the possible layout of the quarks in a pentaquark particle such as those discovered at LHCb. The five quarks might be tightly bonded (left). They might also be assembled into a meson (one quark and one antiquark) and a baryon (three quarks), weakly bound together. © CERN
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Published 15, July 2015 at 800 × 450 in The LHCb experiment at CERN’s Large Hadron Collider reports the discovery of a class of particles known as pentaquarks
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