标题： 双重重夸克强子衰变为一对重夸克强子的模型无关预测 显示英文标题

标题： Model-independent predictions for decays of double-heavy hadrons into pairs of heavy hadrons

摘要： 双重重强子可以通过从束缚的Born-Oppenheimer势跃迁到具有相同Born-Oppenheimer量子数的重强子对势而衰变为重强子对。 双重重强子的状态受到Born-Oppenheimer排斥原理的约束，这是由于相同的重夸克所致。 一对相同重强子的状态受到相同粒子的排斥原理的约束。 这些跃迁也受到角动量和宇称守恒的约束。 从这些约束中，我们推导出双重重强子衰变为重强子对的模型无关的选择规则。 耦合势能表示为Born-Oppenheimer跃迁振幅和角动量系数的乘积之和。 如果存在一个主导的Born-Oppenheimer跃迁振幅，它会从同一Born-Oppenheimer多重态中的双重重强子与特定重夸克自旋对称性多重态中的重强子对之间的耦合势能中分离出来，并从相应的部分衰变率中分离出来。 作为例子，我们讨论了传统双重重强子和双重重四夸克介子的Born-Oppenheimer势能和多重态。 我们还讨论了传统双重重强子衰变为重强子对的部分衰变率相对大小。 显示英文摘要

摘要： Double-heavy hadrons can decay into pairs of heavy hadrons through transitions from confining Born-Oppenheimer potentials to heavy-hadron-pair potentials with the same Born-Oppenheimer quantum numbers. The states of the double-heavy hadron are constrained by a Born-Oppenheimer exclusion principle from the identical heavy quarks. The states of a pair of identical heavy hadrons are constrained by exclusion principles from identical particles. The transitions are also constrained by conservation of angular momentum and parity. From these constraints, we derive model-independent selection rules for decays of double-heavy hadrons into pairs of heavy hadrons. The coupling potentials are expressed as sums of products of Born-Oppenheimer transition amplitudes and angular-momentum coefficients. If there is a single dominant Born-Oppenheimer transition amplitude, it factors out of the coupling potentials between double-heavy hadrons in the same Born-Oppenheimer multiplet and pairs of heavy hadrons in specific heavy-quark-spin-symmetry multiplets and out of the corresponding partial decay rates. As examples, we discuss the Born-Oppenheimer potentials and multiplets for conventional double-heavy baryons and for double-heavy tetraquark mesons. We also discuss the relative partial decay rates for conventional double-heavy baryons into pairs of heavy hadrons.