论文标题
$ b^ - \ to d^-x_ {0,1}（2900）$的分支分数及其含义
Branching fractions of $B^-\to D^-X_{0,1}(2900)$ and their implications
论文作者
论文摘要
最近在$ d^+k^ - in $ d^+k^ - $ b^ - in $ b^ - \ in $ d^-d^-d^-d^+k^ - $ by LHCB协作中观察到异国情调状态$ x_ {0,1}（2900）$带有$ cs \ bar {u} \ bar {d} $的夸克风味。探索$ x_ {0,1}（2900）$的性质，除了分析其群体和衰减宽度外，就像在文献中一样，对其生产机制的研究$ b $ -Meson-Meson弱衰减将提供另一个重要信息。 $ b^ - \ to d^ - x_ {0,1} $的幅度是不可分割的。我们考虑最终的状态相互作用效果，并通过撤销机制对其进行计算。揭示了$ b^ - \至d^ - x_ {0,1} $的测量分支分数。它由$ {b}^ - \toλ_c^-Te_c^{（\ prime）0} $和$λ_b^0 \ to p_c^+k^ - $，脱落机制可以导致相对较大的分支分数。还分析了$ b^ - \toπ^-x_ {0,1} $的类似过程。 $ x_ {0,1} $的isospins可以通过$ b \ to dx_ {0,1}^{\ pm，0} $衰减来研究。
The exotic states $X_{0,1}(2900)$ with the quark flavor of $cs\bar{u}\bar{d}$ are recently observed in the mass spectrum of $D^+K^-$ in $B^-\to D^-D^+K^-$ by the LHCb collaboration. To explore the nature of $X_{0,1}(2900)$, except for analyzing their masses and decay widths as usually did in literatures, the study of their production mechanism in $B$-meson weak decays would provide another important information. The amplitude of $B^-\to D^- X_{0,1}$ is non-factorizable. We consider the final-state-interaction effects and calculate them via the rescattering mechanism. The measured branching fractions of $B^-\to D^- X_{0,1}$ are revealed. It is manifested by ${B}^-\to Λ_c^-Ξ_c^{(\prime)0}$ and $Λ_b^0\to P_c^+K^-$ that the rescattering mechanism can result in the relatively large branching fractions. The similar processes of $B^-\to π^-X_{0,1}$ are also analyzed. The isospins of $X_{0,1}$ can be investigated by $B\to DX_{0,1}^{\pm,0}$ decays.
