${{\boldsymbol X}{(4050)}^{\pm}}$ $I^G(J^{PC})$ = $1^-(?^{? +})$ I, G, C need confirmation.
Properties incompatible with a ${{\mathit q}}{{\overline{\mathit q}}}$ structure (exotic state). See the review on non- ${{\mathit q}}{{\overline{\mathit q}}}$ states. Observed by
MIZUK 2008 in the ${{\mathit \pi}^{+}}{{\mathit \chi}_{{c1}}{(1P)}}$ invariant mass distribution in ${{\overline{\mathit B}}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \chi}_{{c1}}{(1P)}}$ decays. Not seen by
LEES 2012B in this same mode after accounting for ${{\mathit K}}{{\mathit \pi}}$ resonant mass and angular structure.