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Classification | Exotic meson |
---|---|
Composition |
c c d u |
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
J
P = 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. [4] [5]