${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE   JSON PDGID:
M262

${{\mathit X}{(4630)}}$

$I^G(J^{PC})$ = $0^+(?^{? +})$ 
This state shows properties different from a conventional ${{\mathit q}}{{\overline{\mathit q}}}$ state. A candidate for an exotic structure. See the review on "Heavy Non-${{\mathit q}}{{\overline{\mathit q}}}$ Mesons." Seen by AAIJ 2021E in ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit X}{(4630)}}{{\mathit K}^{+}}$ with ${{\mathit X}{(4630)}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ using an amplitude analysis of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}{{\mathit K}^{+}}$ with a significance (accounting for systematic uncertainties) of 5.5 $\sigma $. The $\mathit J{}^{P} = 1{}^{-}$ assignment is favored over ${}^{}2{}^{-}$ with a significance of 3 $\sigma $ and other assignments are disfavored by more than 5 $\sigma $.
${{\mathit X}{(4630)}}$ MASS $4626^{+24}_{-110}$ MeV 
 
${{\mathit X}{(4630)}}$ WIDTH $170^{+140}_{-80}$ MeV 
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit \phi}}$ seen 943