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

INSPIRE search

${{\boldsymbol X}{(4050)}^{\pm}}$ $I^G(J^{PC})$ = $1^-(?^{? +})$ 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.

${{\mathit X}{(4050)}^{\pm}}$ MASS

$4051 {}^{+24}_{-40}$ MeV

${{\mathit X}{(4050)}^{\pm}}$ WIDTH

$82 {}^{+50}_{-28}$ MeV

Decay Modes

$\Gamma_{1}$

${{\mathit \pi}^{+}}{{\mathit \chi}_{{c1}}{(1P)}}$

seen

487

$\Gamma_{2}$

${{\mathit \pi}^{\pm}}{{\mathit \psi}{(3770)}}$

not seen

231