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.
|Composition||2 charm quarks|
1 up antiquark
1 down antiquark
It is hypothesized that studying the behavior of the double-charm tetraquark may play a part in explaining the behavior of the strong force. Following the discovery of the T+
cc, researchers now plan experiments to find its double-beauty counterpart Tbb. This tetraquark has been found to have a longer lifespan than most known exotic-matter particles.