论文标题
$ D_1（2420）$及其与Kaon的互动：开放式魅力状态很奇怪
$D_1(2420)$ and its interactions with a kaon: open charm states with strangeness
论文作者
论文摘要
在这项工作中，我们提出了一种尝试将LHCB协作的$ X_1（2900）$描述，用于在不变质谱的实验数据中，$ d^-k^+$，是$kρ\ bar d $系统的三元分子状态。我们讨论所有子系统中的交互在本质上都是吸引人的，$ρ\ bar d $互动会生成$ \ bar d_1（2420）$，而$kρ$共鸣为$ k_1（1270）$。我们发现该系统可以形成三体状态，但质量高于$ x_1（2900）$。我们也研究了$kρd$系统，发现三体动力学会生成等isscalar状态，该状态可能与$ d_ {s1}}^*（2860）$以及异国情调的Isototector状态有关。后一个状态的质量与$ x_0（2900）$和$ x_1（2900）$的状态相似，但LHCB发现的状态很小，但宽度很小（$ \ sim 7.4 \ pm 0.9 $ MEV），必定需要两个以上的夸克来描述其属性。我们希望我们的发现将鼓励对ISOVECTOR $KρD$ State进行实验调查。最后，为了寻找$ x_1（2900）$的描述，我们研究$π\ bar k^*d^*$ system，其中$ \ bar k^*d^*$ forms $ 0^+$，$ 1^+$，$ 1^+$和$ 2^+$ state。我们找不到可以与$ x_1（2900）$关联的状态。
In this work we present an attempt to describe the $X_1(2900)$ found by the LHCb collaboration, in the experimental data on the invariant mass spectrum of $ D^-K^+$, as a three-meson molecular state of the $Kρ\bar D$ system. We discuss that the interactions in all the subsystems are attractive in nature, with the $ρ\bar D$ interaction generating $\bar D_1(2420)$ and the $K ρ$ resonating as $K_1(1270)$. We find that the system can form a three-body state but with a mass higher than that of $X_1(2900)$. We investigate the $K ρD$ system too, finding that the three-body dynamics generates an isoscalar state, which can be related to $D_{s1}^*(2860)$, and an exotic isovector state. This latter state has a mass similar to that of the $X_0(2900)$ and $X_1(2900)$ states found by LHCb, but a very small width ($\sim 7.4 \pm 0.9$ MeV) and necessarily requires more than two quarks to describe its properties. We hope that our findings will encourage experimental investigations of the isovector $K ρD$ state. Finally, in the pursuit of finding a description for $X_1(2900)$, we study the $π\bar K^* D^*$ system where $ \bar K^*D^*$ forms $0^+$, $1^+$ and $2^+$ states. We do not find a state which can be associated with $X_1(2900)$.
