论文标题
Charmed-Strange Tetraquarks及其在潜在夸克模型中的衰变
Charmed-strange tetraquarks and their decays in a potential quark model
论文作者
论文摘要
In the framework of a nonrelativistic potential quark model, we investigate the mass spectrum of the $1S$-wave charmed-strange tetraquark states of $cn\bar{s}\bar{n}$ and $cs\bar{n}\bar{n}$ ($n=u$ or $d$) systems. Tetraquark系统通过相关的高斯方法求解。通过梅森光谱固定的相同参数，我们获得了$ 1S $ - 波特拉夸克州的质谱。此外，根据预测的四夸克光谱，我们在夸克 - 交换模型中估计它们的重排衰变。我们发现四夸克人的重排衰变可能主要由自旋旋转相互作用驱动。共鸣$ x_0（2900）^0 $和$ t^a_ {c \ bar {s} 0} 0}（2900）^{++/0} $可能被分配为LHCB报告的$最低$ 1S $ -WAVE TETRAQUARK tetraquark tetraquark tetraquark Statate $ $ t^{a} _ {c \ bar {s} 0}（2828）$分别在夸克模型中分类。它还使我们能够将最初的Tetraquark状态的耦合提取到其附近的$ S $波浪交互渠道。我们发现其中一些耦合结果很大。遵循接近阈值强的$ s $波相互作用的波函数重归其化的图片，可观的耦合强度可以被视为其动态起源的指示，是辐射分子的候选者。 Furthermore, our predictions suggest that signals for the $1S$-wave charmed-strange tetraquark states can also be searched in the other channels, such as $D^0K^+$, $D^+K^+$, $D^{*+}K^-$, $D^{*+}K^+$, $D^{*0}K^+$, $ d^0 \ bar {k}^{*0} $，$ d_s^+ρ^0 $，等
In the framework of a nonrelativistic potential quark model, we investigate the mass spectrum of the $1S$-wave charmed-strange tetraquark states of $cn\bar{s}\bar{n}$ and $cs\bar{n}\bar{n}$ ($n=u$ or $d$) systems. The tetraquark system is solved by a correlated Gaussian method. With the same parameters fixed by the meson spectra, we obtained the mass spectra for the $1S$-wave tetraquark states. Furthermore, based on the predicted tetraquark spectra we estimate their rearrangement decays in a quark-exchange model. We find that the rearrangement decays of the tetraquarks may be mainly driven by the spin-spin interactions. The resonances $X_0(2900)^0$ and $T^a_{c\bar{s}0}(2900)^{++/0}$ reported from LHCb may be assigned to be the lowest $1S$-wave tetraquark states $\bar{T}_{cs0}^f(2818)$ and $T^{a}_{c\bar{s}0}(2828)$ classified in the quark model, respectively. It also allows us to extract the couplings for the initial tetraquark states to their nearby $S$-wave interaction channels. We find that some of these couplings turn out to be sizeable. Following the picture of the wavefunction renormalization for the near-threshold strong $S$-wave interactions, the sizeable coupling strengths can be regarded as an indication of their dynamic origins as candidates for hadronic molecules. Furthermore, our predictions suggest that signals for the $1S$-wave charmed-strange tetraquark states can also be searched in the other channels, such as $D^0K^+$, $D^+K^+$, $D^{*+}K^-$, $D^{*+}K^+$, $D^{*0}K^+$, $D^0\bar{K}^{*0}$, $D_s^+ρ^0$, etc.
