Abstract We perform a quantitative analysis of the decays of c c c ¯ c ¯ tetraquarks with J P C = 0 + + , 2 + + into 4 muons and into hidden- and open-charm mesons and estimate, for the first time, the fully charmed tetraquark decay width. The calculated cross section upper limit is ∼ 40 ( 240 ) fb for the 4 muons channel, and ∼ 75 ( 110 ) pb for the D ( ⁎ ) D ¯ ( ⁎ ) → e μ channel, in the 0 + + ( 2 + + ) case. Decay widths depend upon the additional parameter ξ = | Ψ T ( 0 ) | 2 / | Ψ J / ψ ( 0 ) | 2 , which can be computed with a considerable error. We find Γ ( 0 + + ) ∼ Γ ( 2 + + ) = 97 ± 30 . On the basis of our results and with the present sensitivity, LHCb should detect both 0 + + and 2 + + fully-charmed tetraquarks.

中文翻译：

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LHC 中 4 μ 子和 D(⁎)D¯(⁎) 中 cc¯c¯ 四夸克衰变的研究

摘要 我们对 JPC = 0 + + , 2 + + 的 ccc ¯ c ¯ 四夸克衰变到 4 μ 子和隐和开狲介子进行了定量分析，并首次估计了完全粲四夸克的衰变宽度。计算出的截面上限为 ∼ 40 ( 240 ) fb 为 4 μons 通道，D ( ⁎ ) D¯ ( ⁎ ) → e μ 通道为 ∼ 75 ( 110 ) pb，在 0 + + ( 2 + + ) 情况。衰减宽度取决于附加参数 ξ = | Ψ T ( 0 ) | 2 / | Ψ J / ψ ( 0 ) | 2 ，这可以计算有相当大的误差。我们发现 Γ ( 0 + + ) ∼ Γ ( 2 + + ) = 97 ± 30 。根据我们的结果和目前的灵敏度，LHCb 应该可以检测到 0 + + 和 2 + + 完全迷人的四夸克。