论文标题
$ z_ {cs}（3985）$作为$ \ bar d_s^* d + \ bar d_s d^* $互动的阈值效应
The $Z_{cs}(3985)$ as a threshold effect from the $\bar D_s^* D + \bar D_s D^*$ interaction
论文作者
论文摘要
我们研究$ e^+ e^ - \ to k^+（d_s^{* - } d^0+ d_s^ - d^{*0}）$最近在besiii测量的反应，从那里报告了新的$ z_ {cs} $状态。我们研究$ \ bar d_s d^*$与耦合频道的互动$ j/ψk^ - $，$ k^{* - }η_c$，$ d_s^ - d^{*0} $，$ d_s^{* - * - * - } d^0 $通过向Charm Charm Charm Charm Charm sector of Charm隐藏的范围的范围扩展。我们发现$ d_s^ - d^{*0}+ d_s^{* - } d^0 $组合伴侣到$ j/ψk^ - $ and $ k^{* - }η_c$，但是$ d_s^ - d_s^ - d_s^ - d^{*0} - d_s^{* - d_s^{* - } d^0 $组合。 The coupled channels help to build up strength in the $D_s^- D^{*0}+ D_s^{*-} D^0$ diagonal scattering matrix close to threshold and, although the interaction is not strong enough to produce a bound state or resonance, it is sufficient to produce a large accumulation of strength at the $\bar D_s D^*$ threshold in the $e^+ e^- \to k^ +（d_s^{* - } d^0 + d_s^ - d^{*0}）$与实验一致。
We study the $e^+ e^- \to K^+ ( D_s^{*-} D^0 + D_s^- D^{*0})$ reaction recently measured at BESIII, from where a new $Z_{cs}$ state has been reported. We study the interaction of $\bar D_s D^*$ with the coupled channels $J/ψK^-$, $K^{*-} η_c$, $D_s^- D^{*0}$, $D_s^{*-} D^0$ by means of an extension to the charm sector of the local hidden gauge approach. We find that the $D_s^- D^{*0}+ D_s^{*-} D^0$ combination couples to $J/ψK^-$ and $K^{*-} η_c$, but the $D_s^- D^{*0}- D_s^{*-} D^0$ combination does not. The coupled channels help to build up strength in the $D_s^- D^{*0}+ D_s^{*-} D^0$ diagonal scattering matrix close to threshold and, although the interaction is not strong enough to produce a bound state or resonance, it is sufficient to produce a large accumulation of strength at the $\bar D_s D^*$ threshold in the $e^+ e^- \to K^+ ( D_s^{*-} D^0 + D_s^- D^{*0})$ reaction in agreement with experiment.
