论文标题
$ t_ {c \ bar {s}}（2900）$作为阈值效应引起的共振结构的可能性
Possibility of $T_{c\bar{s}}(2900)$ as the resonance-like structure induced by threshold effects
论文作者
论文摘要
我们通过多个撤销过程调查了该过程$ b \ to \ bar {d}d_sπ$。结果表明，从$χ_{c1} k^*d^*$ loop产生的$ d^*k^*$阈值周围的三角形奇异性（TS）相对较窄，这可能会模拟类似于共振的结构$ t_ {c \ bar {s}}}（2900）（2900）$ by lhcb $ d_ $ d_ $ d_但是，TS围绕$ d_s^*ρ$阈值从$ d^{**} d_s^*ρ$回路产生的阈值被$ρ$的宽宽度平滑，本身几乎无法描述$ t_ {c \ bar {s}}}（2900）$结构。还预测了$ dk $ threshold周围的ts信号，也预测了$χ_{C0} k d $ loop的阈值。
We investigate the process $B\to \bar{D}D_s π$ via several rescattering processes. It is shown that the triangle singularity (TS) peak around the $D^*K^*$ threshold generated from the $χ_{c1}K^* D^*$ loop is relatively narrow, which may simulate the resonance-like structure $T_{c\bar{s}}(2900)$ recently observed by LHCb in the $D_sπ$ spectrum. However, the TS peak around the $D_s^*ρ$ threshold generated from the $D^{**} D_s^* ρ$ loop is smoothed by the broad width of $ρ$, which itself can hardly describe the $T_{c\bar{s}}(2900)$ structure. A TS signal around the $DK$ threshold generated from the $χ_{c0}K D $ loop is also predicted.
