论文标题
朝着$ z_ {cs}（3985）$结构下的反射机制
Toward charged $Z_{cs}(3985)$ structure under a reflection mechanism
论文作者
论文摘要
最近，BESIII合作报道了一个被充电的隐藏结构，在一个过程的$ k^+$中，$ e^+e^ - \ \ to d_s^{* - } d^0k^+$或$ d^+$或$ d_S^{ - } d^{ - } d^{*0} k^+$，将其称为$ z__} $} $} $新观察到的充电结构可以被视为具有陌生$ z_ {c}（3885）（3885）^{ - } $的合作伙伴结构。在这项工作中，我们提出了一张新颖的图片，以了解$ z_ {cs}（3985）$的性质。 By performing a combined analysis for the line shape of the recoil mass distribution of $K^+$ at five energy points $\sqrt{s}=4.628, 4.641, 4.661, 4.681, 4.698$ GeV, we find that the $Z_{cs}(3985)$ can be explained as a reflection structure of charmed-strange meson $ d_ {s2}^{*}（2573）$，它是由$ y（4660）$的开放式衰减产生的，带有$ d_s^*$梅森。 Furthermore, we predicted the angular distribution of final state $D_s^{*-}$ in process $e^+e^-\to D_s^{*-}D^0K^+$ based on our proposed reaction mechanism, which may be an essential criterion to test the non-resonant nature of $Z_{cs}(3985)$ further.
Very recently, the BESIII collaboration reported a charged hidden-charm structure with strangeness in the recoil mass of $K^+$ of a process $e^+e^-\to D_s^{*-}D^0K^+$ or $D_s^{-}D^{*0}K^+$, which is named as $Z_{cs}(3985)^{-}$. The newly observed charged structure can be treated as a partner structure with strangeness of well-known $Z_{c}(3885)^{-}$ reported in a process $e^+e^-\to D^{*-}D^0π^+$. In this work, we propose a novel picture to understand the nature of $Z_{cs}(3985)$. By performing a combined analysis for the line shape of the recoil mass distribution of $K^+$ at five energy points $\sqrt{s}=4.628, 4.641, 4.661, 4.681, 4.698$ GeV, we find that the $Z_{cs}(3985)$ can be explained as a reflection structure of charmed-strange meson $D_{s2}^{*}(2573)$, which is produced from the open-charm decay of $Y(4660)$ with a $D_s^*$ meson. Furthermore, we predicted the angular distribution of final state $D_s^{*-}$ in process $e^+e^-\to D_s^{*-}D^0K^+$ based on our proposed reaction mechanism, which may be an essential criterion to test the non-resonant nature of $Z_{cs}(3985)$ further.
