论文标题
异国情调$ \ bar {d} _s^{（*）} d^{（*）} $分子状态和$ sc \ bar q \ bar c $ tetraquark状态，$ j^p = 0^+，1^+，2^+$
Exotic $\bar{D}_s^{(*)}D^{(*)}$ molecular states and $sc\bar q\bar c$ tetraquark states with $J^P=0^+, 1^+, 2^+$
论文作者
论文摘要
我们已经计算了$ \ bar {d} _s^{（*）} d^{（*）} $分子状态和$ sc \ bar q \ bar c $ tetraquark状态，$ j^p = 0^+，1^+，2^+$。轴向矢量$ \ bar {d} _sd^{*} $，$ \ bar {d} _s _s^{*} d $分子状态和$ \ Mathbf {1} _ {[sc [sc} \ oplus \ oplus \ mathbf {0} _ {0} _ {\ bar q { $ \ mathbf {0} _ {[[sc]} \ oplus \ mathbf {1} _ {[[\ bar q \ bar {c}]} $ tetraquark Status预计将大约为3.98 GEV，与$ Z_ {CS}（CS}（3985）（3985）（3985）^ - 3985）^ - $ z____- \ cite {besiii2020zcs}。在分子和diquark-antidiquark图片中，我们的结果表明，可能存在两个几乎退化的状态，因为$ x（3872）$和$ z_c（3900）$的奇怪合作伙伴。我们建议在将来的实验中仔细检查$ z_ {cs}（3985）$，以验证这一点。人们还可以在开放式$ \ bar {d} _s _s^{（*）} d^{（*）$ Channels中搜索更奇怪的隐藏式四夸克状态，而且在隐藏的charm channels $η_ck/k/k/k^\ ast $，$ j/st $，$ j/ar/ψk/ψk/ar k^\ ast $ ast $中。
We have calculated the mass spectra for the $\bar{D}_s^{(*)}D^{(*)}$ molecular states and $sc\bar q\bar c$ tetraquark states with $J^P=0^+, 1^+, 2^+$. The masses of the axial-vector $\bar{D}_sD^{*}$, $\bar{D}_s^{*}D$ molecular states and $\mathbf{1}_{[sc]} \oplus \mathbf{0}_{[\bar q \bar{c}]}$, $\mathbf{0}_{[sc]} \oplus \mathbf{1}_{[\bar q \bar{c}]}$ tetraquark states are predicted to be around 3.98 GeV, which are in good agreement with the mass of $Z_{cs}(3985)^-$ from BESIII \cite{besiii2020Zcs}. In both the molecular and diquark-antidiquark pictures, our results suggest that there may exist two almost degenerate states, as the strange partners of the $X(3872)$ and $Z_c(3900)$. We propose to carefully examine the $Z_{cs}(3985)$ in future experiments to verify this. One may also search for more hidden-charm four-quark states with strangeness not only in the open-charm $\bar{D}_s^{(*)}D^{(*)}$ channels, but also in the hidden-charm channels $η_c K/K^\ast$, $J/ψK/K^\ast$.
