论文标题
在Born-oppenheimer近似中的双重沉重的四夸克
Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation
论文作者
论文摘要
发现用氢键的量子染色体动力学版本很好地描述了QQQ* Q*，并用Born-Oppenheimer近似处理。我们通过在两个不同的路径下计算观察到的TCC四夸克的质量来显示该方法的鲁棒性。依靠这一点，我们为预期的TBB粒子的质量提供了预测。据估计，四夸克的平均尺寸约为3-5 GEV ** -1。因此，预期超精细分离不会很大。我们讨论了LHCB在DD*频谱中仅观察到一个状态的可能原因。
Tetraquarks QQq*q* are found to be described remarkably well with the Quantum Chromodynamics version of the Hydrogen bond, as treated with the Born-Oppenheimer approximation. We show the robustness of the method by computing the mass of the observed Tcc tetraquark following two different paths. Relying on this, we provide a prediction for the mass of the expected Tbb particle. The average sizes of tetraquarks are estimated to be approximately 3 - 5 GeV**-1. As a consequence hyperfine separations are not expected to be sizeable. We discussed possible reasons why LHCb has observed only one state in the DD* spectrum.
