论文标题
$ t_ {c \ bar {s}}（2900）$作为$ d^*k^*$，$ d^*_sρ$ CHANNELS的相互作用的阈值效应
The $T_{c\bar{s}}(2900)$ as a threshold effect from the interaction of the $D^*K^*$, $D^*_sρ$ channels
论文作者
论文摘要
我们查看$ d_s^+π^ - $在$ b^0 \ to \ bar {d}^0 d_s^+π^ - $衰减中的质量分布，其中在$ d^*_ sρ$，$ d^*k^*$ theSholds中观察到了峰值。通过创建这两个频道与$ \ bar {d}^0 $中的$ b^0 $衰变并让它们作为耦合通道相互作用，我们获得了围绕其阈值的结构，而没有产生界限，从而导致$ d_s^+π^ - $ b^0 \ bar \ bar \ bar $ b^0 d_ $ b^0 d^d d d d d d d d d d deve^0 d d d d d d d d d d d dece^dev^d d d deve。我们得出的结论是，$ d^*k^*$和$ d^*_sρ$之间的相互作用对于生产我们将我们关联到最近看到的$ t_ {c \ bar {s}}（2900）$的cusp结构至关重要，并且其实验宽度主要是由于$ρ$ meson的衰减宽度。与平滑背景获得的峰相当很好地重现了在$ b_0 \ to \ bar {d}^0 d_s^+π^ - $ decay中观察到的实验质量分布。
We look at the mass distribution of the $D_s^+ π^-$ in the $B^0 \to \bar{D}^0 D_s^+ π^-$ decay, where a peak has been observed in the region of the $D^*_s ρ$, $D^* K^*$ thresholds. By creating these two channels together with a $\bar{D}^0$ in $B^0$ decay and letting them interact as coupled channels, we obtain a structure around their thresholds, short of producing a bound state, which leads to a peak in the $D_s^+ π^-$ mass distribution in the $B^0 \to \bar{D}^0 D_s^+ π^-$ decay. We conclude that the interaction between the $D^*K^*$ and $D^*_sρ$ is essential to produce the cusp structure that we associate to the recently seen $T_{c\bar{s}}(2900)$, and that its experimental width is mainly due to the decay width of the $ρ$ meson. The peak obtained together with a smooth background reproduces fairly well the experimental mass distribution observed in the $B_0 \to \bar{D}^0 D_s^+ π^-$ decay.
