Abstract We perform a quantitative analysis of the b b b ¯ b ¯ tetraquark decays into hidden- and open-bottom mesons and calculate, for the first time, the b b b ¯ b ¯ tetraquark total decay width. On the basis of our results, we propose the b b b ¯ b ¯ → B + B − ( B 0 B ¯ 0 ) ( B s 0 B ¯ s 0 ) → l + l − + X decays as the most suitable channels to observe the b b b ¯ b ¯ tetraquark states, since the calculated two-lepton cross section upper limit, ≃39 fb, is so large as to be potentially detectable with the 2018 LHCb sensitivity, paving the way to the observation of the b b b ¯ b ¯ tetraquark in the future LHCb upgrade. The 4μ signal for the ground state, J P C = 0 + + , is likely to be too small even for the upgraded LHCb, but it may not be hopeless for the J P C = 2 + + fully-bottom state.

中文翻译：

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在 LHC 的 4 个介子、B+B−、B0B¯0 和 Bs0B¯s0 通道中寻找 bbb¯b¯ 四夸克衰变

摘要 我们对 bbb ¯ b 四夸克衰变成隐底介子和开底介子进行了定量分析，并首次计算了 bbb ¯ b 四夸克的总衰变宽度。根据我们的结果，我们建议 bbb ¯ b¯ → B + B − ( B 0 B ¯ 0 ) ( B s 0 B¯ s 0 ) → l + l − + X 衰减作为最适合观察的通道bbb ¯ b 四夸克态，因为计算出的双轻子截面上限≃39 fb 大到可以用 2018 LHCb 灵敏度检测到，为观察 bbb ¯ b 四夸克铺平了道路在未来的 LHCb 升级中。基态的 4μ 信号 JPC = 0 + + ，即使对于升级后的 LHCb 也可能太小，但对于 JPC = 2 + + 全底态可能并非没有希望。