We calculate the masses of \(\chi _{\mathrm{c}}(3P)\) states with threshold corrections in a coupled-channel model. The model was recently applied to the description of the properties of \(\chi _{\mathrm{c}}(2P)\) and \(\chi _{\mathrm{b}}(3P)\) multiplets (Ferretti and Santopinto in Phys Lett B 789:550, 2019]. We also compute the open-charm strong decay widths of the \(\chi _{\mathrm{c}}(3P)\) states and their radiative transitions. According to our predictions, the \(\chi _{\mathrm{c}}(3P)\) states should be dominated by the charmonium core, but they may also show small meson-meson components. The X(4274) is interpreted as a \(c {{\bar{c}}}\) \(\chi _{\mathrm{c1}}(3P)\) state. More information on the other members of the \(\chi _{\mathrm{c}}(3P)\) multiplet, as well as a more rigorous analysis of the X(4274)’s decay modes, are needed to provide further indications on the quark structure of the previous resonance.

中文翻译：

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$$ \ chi _ {\ mathrm {c}}（3P）$$χc（3P）和X（4274）共振及其强衰变和辐射衰变的夸克结构

我们在耦合通道模型中通过阈值校正来计算\（\ chi _ {\ mathrm {c}}（3P）\）状态的质量。该模型最近应用于描述\（\ chi _ {\ mathrm {c}}（2P）\）和\（\ chi _ {\ mathrm {b}}（3P）\）多重峰的属性（Ferretti和Santopinto在Phys Lett B 789：550，2019]中，我们还计算了\（\ chi _ {\ mathrm {c}}（3P）\）状态及其辐射跃迁的开放强衰变宽度。我们的预测，\（\ chi _ {\ mathrm {c}}（3P）\）状态应由the骨球核心控制，但它们也可能显示较小的介子介子分量。X（4274）解释为\（c {{\ bar {c}}} \） \（\ chi _ {\ mathrm {c1}}（3P）\）状态。需要更多有关\（\ chi _ {\ mathrm {c}}（3P）\）多重峰的更多信息，以及对X（4274）衰减模式的更严格分析，以提供进一步的信息先前共振的夸克结构的指示。