Z(4430)
Z(4430)
Mesonic resonance discovered by the Belle experiment
Z(4430) is a mesonic resonance discovered by the Belle experiment.[1][2] It has a mass of 4430 MeV/c2. 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
c
c
d
u
,[3] making it a tetraquark candidate. It has the spin-parity quantum numbers JP = 1+.
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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.[4][5]