${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE   JSON PDGID:
M190

${{\mathit X}{(4160)}}$

$I^G(J^{PC})$ = $?^?(?^{? ?})$ 
Seen by PAKHLOV 2008 in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit X}}$, ${{\mathit X}}$ $\rightarrow$ ${{\mathit D}^{*}}{{\overline{\mathit D}}^{*}}$ A state with consistent mass and width is seen by AAIJ 2021E in ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit X}{(4160)}}{{\mathit K}^{+}}$ with ${{\mathit X}{(4160)}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ using an amplitude analysis of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}{{\mathit K}^{+}}$ with a significance (accounting for systematic uncertainties) of 4.8 $\sigma $. The $\mathit J{}^{PC} = 2{}^{-+}$ assignment is favored over other assignments with a significance of more than 4 $\sigma $.
${{\mathit X}{(4160)}}$ MASS $4153^{+23}_{-21}$ MeV 
 
${{\mathit X}{(4160)}}$ WIDTH $136^{+60}_{-35}$ MeV 
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level
P(MeV/c)  
$\Gamma_{1}$ ${{\mathit D}}{{\overline{\mathit D}}}$ not seen 913
 
$\Gamma_{2}$ ${{\mathit D}^{*}}{{\overline{\mathit D}}}$ + c.c. not seen  
 
$\Gamma_{3}$ ${{\mathit D}^{*}}{{\overline{\mathit D}}^{*}}$ seen 520
 
$\Gamma_{4}$ ${{\mathit J / \psi}}{{\mathit \phi}}$ seen 237