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INSPIRE   JSON PDGID: M272

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6600)}}$ $I^G(J^{PC})$ = $0^+(2^{+ +})$

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. Needs confirmation. See the review on "Heavy Non-${{\mathit q}}{{\overline{\mathit q}}}$ Mesons."

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6600)}}$ MASS   $6646 {}^{+28}_{-25}$ MeV

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6600)}}$ WIDTH   $440 \pm70$ MeV

${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6600)}}$ DECAY MODES
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit J / \psi}}$   seen
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