论文标题
Axial-vector和pseudoscalar tetraquarks $ [ud] [\ bar {c} \ bar {s}] $
Axial-vector and pseudoscalar tetraquarks $[ud][\bar{c}\bar{s}]$
论文作者
论文摘要
光谱参数和完全开放量培养的轴向矢量和伪尺度tetraquarks $ x _ {\ Mathrm {av}} $和$ x _ {\ m mathrm {ps mathrm {ps ps}} $带有内容$ [ud] [ud] [ud] [ud] 方法。 $ x _ {\ mathrm {av}} $和$ x_ {\ mathrm {ps}} $的质量和当前耦合使用两点总和规则计算通过考虑各种真空冷凝物，最高到尺寸$ 10 $。轴向矢量状态$ x _ {\ mathrm {av}} $的完整宽度通过包括在分析$ s $ -s $ -Wave衰减模式中$ x _ {\ MATHRM {av}} \ to d^{\ ast}（\ ast ast}（2010）（2010）^{ - } k^{ - } k^{ - } }（2007）^{0} k^{0} $，$ d^{ - } k^{\ ast}（892）^{+} $，以及$ \ overline {d}^{0} k^{0} k^{\ ast}（\ ast}（892）（892）^{0} $。在$ x_ {\ mathrm {ps}} $的情况下，我们考虑$ s $ - 波衰减$ x _ {\ mathrm {\ mathrm {ps}}} \ to \ overline {d} _ {0} _ {0}^{\ ast}^{\ ast}（2300）（2300） $ x _ {\ mathrm {ps}}} \ to d^{ - } k^{\ ast}（892）^{+} $和$ x _ {\ Mathrm {ps}}} \ to \ to \ to \ to \ to \ overline {d}^{d}^{0} k^{0} k^{0} k^{\ ast} $ {892）为了确定这些衰减模式的部分宽度，我们采用QCD轻单和规则方法和软膜近似，这对于估算Tetraquark-Meson-Meson-Meson-Meson Vertices $ X _ _ {\ Mathrm {av}}} d^{ - } d^{ - } d^^ustion是必不可少的，这是必要的。对于质量$ m _ {\ Mathrm {av}} =（2800 \ pm 75） $ M _ {\ MathRM {ps}} =（3000 \ pm 60）多Quark Hadron。
Spectroscopic parameters and widths of the fully open-flavor axial-vector and pseudoscalar tetraquarks $X_{\mathrm{AV}}$ and $X_{\mathrm{PS}}$ with content $[ud][\overline{c}\overline{s}]$ are calculated by means of the QCD sum rule methods. Masses and current couplings of $X_{\mathrm{AV}}$ and $X_{ \mathrm{PS}}$ are found using two-point sum rule computations performed by taking into account various vacuum condensates up to dimension $10$. The full width of the axial-vector state $X_{\mathrm{AV}}$ is evaluated by including into analysis $S$-wave decay modes $X_{\mathrm{AV}}\to D^{\ast }(2010)^{-}K^{+}$, $\overline{D}^{\ast }(2007)^{0}K^{0}$, $D^{-}K^{\ast }(892)^{+}$, and $\overline{D}^{0}K^{\ast }(892)^{0}$. In the case of $X_{ \mathrm{PS}}$, we consider $S$-wave decay $X_{\mathrm{PS}}\to \overline{D} _{0}^{\ast }(2300)^{0}K^{0}$, and $P$-wave processes $X_{\mathrm{PS}}\to D^{-}K^{\ast}(892)^{+}$ and $X_{\mathrm{PS}}\to \overline{D} ^{0}K^{\ast}(892)^{0}$. To determine partial widths of these decay modes, we employ the QCD light-cone sum rule method and soft-meson approximation, which are necessary to estimate strong couplings at tetraquark-meson-meson vertices $X_{\mathrm{AV}}D^{-}D^{\ast }(2010)^{-}K^{+} $, etc. Our predictions for the mass $m_{\mathrm{AV}}=(2800 \pm 75)~\mathrm{MeV}$ and width $Γ_{\mathrm{AV}}=(58 \pm 10)~\mathrm{MeV}$ of the tetraquark $X_{ \mathrm{AV}}$, as well as results $m_{\mathrm{PS}}=(3000 \pm 60)~\mathrm{MeV} $ and $Γ_{\mathrm{PS}}=(65 \pm 12)~\mathrm{MeV}$ for the same parameters of $X_{\mathrm{PS}}$ may be useful in future experimental studies of multiquark hadrons.
