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About: Double-charm tetraquark     Goto   Sponge   NotDistinct   Permalink

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The double-charm tetraquark (T+cc, ccud) is a type of long-lived tetraquark that was discovered in 2021 in the LHCb experiment conducted at the Large Hadron Collider. It contains four quarks: two charm quarks, an anti-up and an anti-down quark. It has a theoretical computed mass of 3868±124 MeV/c2. The discovery showed an exceptionally strong peak, with 20-sigma significance.