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

${{\mathit \chi}_{{c0}}{(3915)}}$

$I^G(J^{PC})$ = $0^+(0^{+ +})$ 

was ${{\mathit X}{(3915)}}$
The ${{\mathit \chi}_{{c0}}{(3915)}}$ was originally seen by BELLE in its ${{\mathit \omega}}{{\mathit J / \psi}}$ decay mode and was produced in both ${{\mathit B}}$ decays in CHOI 2005 and ${{\mathit \gamma}}{{\mathit \gamma}}$ collisions in UEHARA 2010 . The $\mathit J{}^{PC}$ was determined to be ${}^{}0{}^{++}$ by BABAR in LEES 2012AD but this assignment was questioned by ZHOU 2015C. In AAIJ 2020AI LHCb found the ${{\mathit D}^{+}}{{\mathit D}^{-}}$ decay mode of the ${{\mathit \chi}_{{c0}}{(3915)}}$ using ${{\mathit B}}$ decays and determined its $\mathit J{}^{PC}$ to be ${}^{}0{}^{++}$. Based on their compatible mass, width, and $\mathit J{}^{PC}$, we assume the state decaying to ${{\mathit \omega}}{{\mathit J / \psi}}$ and the state decaying to ${{\mathit D}^{+}}{{\mathit D}^{-}}$ are both the ${{\mathit \chi}_{{c0}}{(3915)}}$. See also the ${{\mathit \chi}_{{c2}}{(3930)}}$.
${{\mathit \chi}_{{c0}}{(3915)}}$ MASS   $3921.7 \pm1.8$ MeV (S = 1.5)
${{\mathit \chi}_{{c0}}{(3915)}}$ WIDTH   $18.8 \pm3.5$ MeV 
$\Gamma_{1}$ ${{\mathit \omega}}{{\mathit J / \psi}}$   seen 231
$\Gamma_{2}$ ${{\overline{\mathit D}}^{*0}}{{\mathit D}^{0}}$   not seen 312
$\Gamma_{3}$ ${{\mathit D}^{+}}{{\mathit D}^{-}}$   seen 591
$\Gamma_{4}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}_{{c}}{(1S)}}$   not seen 788
$\Gamma_{5}$ ${{\mathit \eta}_{{c}}}{{\mathit \eta}}$   not seen 668
$\Gamma_{6}$ ${{\mathit \eta}_{{c}}}{{\mathit \pi}^{0}}$   not seen 817
$\Gamma_{7}$ ${{\mathit K}}{{\overline{\mathit K}}}$   not seen 1898
$\Gamma_{8}$ ${{\mathit \gamma}}{{\mathit \gamma}}$   seen 1961
$\Gamma_{9}$ ${{\mathit \gamma}}{{\mathit \psi}{(2S)}}$   228
$\Gamma_{10}$ ${{\mathit \pi}^{0}}{{\mathit \chi}_{{c1}}}$   not seen 368