论文标题
建模共振$ t_ {cs0}^{a}（2900）^{++} $作为HADRONIC MOLECUEL $ d^{\ ast +} k^{\ ast +} $
Modeling the resonance $T_{cs0}^{a}(2900)^{++}$ as a hadronic molecule $D^{\ast +}K^{\ast +}$
论文作者
论文摘要
在Hadronic Molecule模型的背景下，研究了双电荷的标量共振$ T_ {CS0}^{A}（2900）^{++} $。我们将$ t_ {cs0}^{a}（2900）^{++} $作为分子$ m = d^{\ ast +} k^{\ ast +} $由矢量中的媒介组成，并计算其质量，当前量和全宽度。 $ M $的光谱参数（即其质量和当前耦合）是通过考虑Quark，Gluon和混合操作员的真空期望值的QCD两点总规则方法来找到的，最高为$ 10 $。分子$ m $的宽度通过计算衰减通道的部分宽度$ m \ to d_ {s}^{s}^{+}π^{+} $，$ m \ to d_ {s} {s}^{s}^{\ ast+ast+}ρ^{+}ρ^{+} p^{+} $ m} +} $。这些过程的部分宽度取决于强度$ g_1 $，$ g_2 $和$ g_3 $的粒子在顶点上+} $分别。我们通过采用QCD轻单和规则方法和软件近似的技术工具来计算耦合$ g_i $。对质量$ m =（2924 \ pm 107）〜\ mathrm {mev} $和宽度$γ=（123 \ pm 25）
The doubly charged scalar resonance $T_{cs0}^{a}(2900)^{++}$ is studied in the context of the hadronic molecule model. We consider $ T_{cs0}^{a}(2900)^{++}$ as a molecule $M=D^{\ast +}K^{\ast +}$ composed of vector mesons, and calculate its mass, current coupling and full width. The spectroscopic parameters of $M$, i.e., its mass and current coupling, are found by means of the QCD two-point sum rule method by taking into account vacuum expectation values of quark, gluon and mixed operators up to dimension $10$. The width of the molecule $M$ is evaluated through the calculations of the partial widths of the decay channels $M \to D_{s}^{+}π^{+}$, $M \to D_{s}^{\ast +}ρ^{+}$, and $M \to D^{\ast +}K^{\ast +}$. Partial widths of these processes are determined by strong couplings $g_1$, $g_2$, and $g_3$ of particles at vertices $ MD_{s}^{+}π^{+} $, $MD_{s}^{\ast +}ρ^{+}$, and $M D^{\ast +}K^{\ast +}$ , respectively. We calculate the couplings $g_i$ by employing the QCD light-cone sum rule approach and technical tools of the soft-meson approximation. Predictions obtained for the mass $m=(2924 \pm 107)~\mathrm{ MeV}$ and width $Γ=(123 \pm 25)~\mathrm{MeV}$ of the hadronic molecule $ M$ allow us to consider it as a possible candidate of the resonance $ T_{cs0}^{a}(2900)^{++}$.
