pdgLive Home   >   OTHER MESONS   >   ${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$

INSPIRE   JSON PDGID: M268

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$ $I^G(J^{PC})$ = $0^+(2^{+ +})$

was ${{\mathit X}{(6900)}}$

Assuming that all structures seen in the ${{\mathit J / \psi}}{{\mathit J / \psi}}$ final state have the same quantum numbers, CMS determined those to $\mathit J{}^{PC} = 2{}^{++}$ (HAYRAPETYAN 2025AG). State incompatible with a ${{\mathit q}}{{\overline{\mathit q}}}$ structure. See the review on "Heavy Non-${{\mathit q}}{{\overline{\mathit q}}}$ Mesons."

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$ MASS   $6898 \pm12$ MeV (S = 1.2)

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$ WIDTH   $161 \pm26$ MeV

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$ DECAY MODES
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit J / \psi}}$   seen
FOOTNOTES