${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS
(including possibly non- ${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE search

${{\mathit \chi}_{{c1}}{(4685)}}$

$I^G(J^{PC})$ = $0^+(1^{+ +})$ 
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 ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit \chi}_{{c1}}{(4685)}}{{\mathit K}^{+}}$ with ${{\mathit \chi}_{{c1}}{(4685)}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ using an amplitude analysis of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}{{\mathit K}^{+}}$ with a significance (accounting for systematic uncertainties) of 15 $\sigma $. The $\mathit J{}^{P} = 1{}^{+}$ assignment is favored with high significance.
${{\mathit \chi}_{{c1}}{(4685)}}$ MASS   $4684 {}^{+15}_{-17}$ MeV 
 
${{\mathit \chi}_{{c1}}{(4685)}}$ WIDTH   $126 \pm40$ MeV 
 
$\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit \phi}}$  seen 1002
 
FOOTNOTES