Z (4430)

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Z (4430) - subatomic particle, discovered in an exotic Belle hadron experiment constructed of four quarks (tetrakwark). The particle mass is 4430 MeV / c². Particle Z (4430) has a negative electric charge, its postulated quark composition is: c c ¯ d u ¯ {\displaystyle c{\overline {c}}d{\overline {u}}} . Z (4430) is a resonance.

The particle was discovered in 2007 by a detector Belle, located in the Japanese High Energy Physics Laboratory (KEK) near Tsukuba. Its existence was confirmed in 2014 in the LHCb experiment, at a significance level of at least 13.9 σ.

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