$\mathbf {{{\mathit Z}_{{cs}}{(4220)}^{+}}}$ $\mathit I(\mathit J{}^{P}) = 1/2(1{}^{+})$

INSPIRE   PDGID:
M300K33
MASS ${\mathrm {(MeV)}}$ WIDTH ${\mathrm {(MeV)}}$ DOCUMENT ID TECN  COMMENT
$ 4216 \pm24 {}^{+43}_{-30} $ $\text{233}$ 1, 2
AAIJ
2021E
 LHCB ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}{{\mathit K}^{+}}$
1  From an amplitude analysis of the decay ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}{{\mathit K}^{+}}$ with a significance of 5.9 $\sigma $.
2  Properties incompatible with a ${{\mathit q}}{{\overline{\mathit q}}}$ structure (exotic state). See the review on "Heavy Non-${{\mathit q}}{{\overline{\mathit q}}}$ Mesons."
References:
AAIJ 2021E
PRL 127 082001 Observation of New Resonances Decaying to $J/\psi K^+$+ and $J/\psi \phi$