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${{\mathit T}_{{{c {{\overline{\mathit c}}}}}}{(4055)}^{+}}$

$I^G(J^{PC})$ = $1^+(?^{? -})$ I, G, C need confirmation.

was ${{\mathit X}{(4055)}^{\pm}}$

Properties incompatible with a ${{\mathit q}}{{\overline{\mathit q}}}$ structure (exotic state). See the review on non-${{\mathit q}}{{\overline{\mathit q}}}$ states. Needs confirmation. Seen by WANG 2015A in the ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}$ invariant mass distribution in ${{\mathit \psi}{(4360)}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ decay.

${{\mathit T}_{{{c {{\overline{\mathit c}}}}}}{(4055)}^{+}}$ MASS

$4054$ $\pm3.2$ MeV

${{\mathit T}_{{{c {{\overline{\mathit c}}}}}}{(4055)}^{+}}$ WIDTH

$45$ $\pm13$ MeV

${{\mathit T}_{{{c {{\overline{\mathit c}}}}}}{(4055)}^{+}}$ DECAY MODES

Mode

Fraction ($\Gamma_i$ / $\Gamma$)

Scale Factor/
Conf. Level

P(MeV/c)

$\Gamma_{1}$

${{\mathit \pi}^{+}}{{\mathit \psi}{(2S)}}$

seen

325

$\Gamma_{2}$

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

not seen

235

Except where otherwise noted, content of the 2025 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2025. See LBNL disclaimers.

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${{\mathit T}_{{{c {{\overline{\mathit c}}}}}}{(4055)}^{+}}$