论文标题
$ z_c（3900）$和$ z_ {cs}（3985）$ exotic状态的组合分析
A combined analysis of the $Z_c(3900)$ and the $Z_{cs}(3985)$ exotic states
论文作者
论文摘要
我们已经对$ z_c（3900）$和$ z_ {cs}（3985）$结构的BESIII数据进行了组合分析，假设后者是前一个的SU（3）风味伙伴。我们已经改善了对Albaladejo $ et $ al的先前分析。 Lett。 b 755，337（2016）]通过计算$ d_1 \ bar {d} d^*$三角形图的幅度考虑$ d $和$ d $和$ s $ -wave $ d_1d^*π$耦合。我们还调查了SU（3）侵略侵略的效果，这些味道被认为是中等的，命令为20％。在隐藏的和隐藏的奇怪部门中，BESIII光谱的成功再现都强烈支持$ z_ {cs}（3985）$和$ z_c（3900）$是SU（3）风味伙伴，放置在同一八位内部的多重倍数中。当包括对角线$ d^{（*）} \ bar d _ {（s）}^{（*）} $相互作用中的能量依赖项时，获得了最佳结果，导致共振（极高阈值以上）来描述这些异国情调的状态。我们还对ISOVECTOR进行了预测$ z_ {c}^*$和ISODBOULT $ z_ {cs}^*$，$ d^*\ bar {d}^*$ and $ d^*\ bar {d} _ {s} _ {s} _ {s}^$ molecules $ j^{p} = 1^{+} $。这些状态将是$ z_ {c} $和$ z_ {cs} $的重型旋转对称合作伙伴。除了确定$ z_c（3900）$和$ z_ {cs}（3985）$的质量和宽度外，我们还预测了$ z_c^*$和$ z_ {cs}^*$ resonances的$ z_c^*$和$ z_c^*$。
We have performed a combined analysis of the BESIII data for both the $Z_c(3900)$ and $Z_{cs}(3985)$ structures, assuming that the latter is an SU(3) flavor partner of the former one. We have improved on the previous analysis of Albaladejo $et$ $al.$ [Phys. Lett. B 755, 337 (2016)] by computing the amplitude for the $D_1\bar{D}D^*$ triangle diagram considering both $D$ and $S$-wave $D_1D^*π$ couplings. We have also investigated effects from SU(3) light-flavor violations, which are found to be moderate and of the order of 20%. The successful reproduction of the BESIII spectra, in both the hidden-charm and hidden-charm strange sectors, strongly supports that the $Z_{cs}(3985)$ and $Z_c(3900)$ are SU(3) flavor partners placed in the same octet multiplet. The best results are obtained when an energy-dependent term in the diagonal $D^{(*)}\bar D_{(s)}^{(*)}$ interaction is included, leading to resonances (poles above the thresholds) to describe these exotic states. We have also made predictions for the isovector $Z_{c}^*$ and isodoublet $Z_{cs}^*$, $D^*\bar{D}^*$ and $D^*\bar{D}_{s}^*$ molecules, with $J^{PC}=1^{+-}$ and $J^{P}=1^{+}$, respectively. These states would be heavy-quark spin symmetry partners of the $Z_{c}$ and $Z_{cs}$. Besides the determination of the masses and widths of the $Z_c(3900)$ and $Z_{cs}(3985)$, we also predict those of the $Z_c^*$ and $Z_{cs}^*$ resonances.
