Z(4430) is a mesonic resonance discovered by the Belle experiment.
The resonant nature of the peak has been confirmed by the LHCb experiment with a significance of at least 13.9 σ.
[3] The particle is charged and is thought to have a quark content of ccdu,[3] making it a tetraquark candidate.
It has the spin-parity quantum numbers JP = 1+.
The particle joins the X(3872), Zc(3900) and Y(4140) as exotic hadron candidates observed by multiple experiments, although it is the first to be confirmed as a resonance.