标题： $D_s^+\toφ\ell^+ν_\ell$衰变的态随手征奇异性$φ$-介子的光锥分布振幅（LCDA）的变化状态 显示英文标题

标题： Status of $D_s^+\toφ\ell^+ν_\ell$ decay with chiral-odd $φ$-meson LCDA

摘要： 由于其独特的性质，$\phi$介子的 twist-2 分布振幅引起了相当大的兴趣。在这项工作中，我们利用光锥谐振子（LCHO）模型构建了$\phi$介子的横向 leading-twist 光锥分布振幅 (\$LCDA\$)$\phi_{2;\phi}^\bot(x,\mu_0)$，其中参数$B_{2;\phi}^\bot$主要控制其纵向分布。为了明确分离不同的 twist 贡献，我们在 QCD 光锥求和规则（LCSR）计算$D_s^+\to\phi$衰变时使用右手螺旋关联函数，并进一步得到分支比$\mathcal{B}(D_s^+ \to \phi e^+\nu_e )= (2.271_{-0.243}^{+0.291})\times 10^{-2}$和$\mathcal{B}(D_s^+ \to \phi \mu^+\nu_\mu )=(2.250_{-0.240}^{+0.287})\times 10^{-2}$，其中误差是上述误差来源的平方平均值。 此外，我们通过分析以更高的精度提取了 Cabibbo-Kobayashi-Maskawa (CKM) 矩阵元$|V_{cs}|=0.975_{-0.066}^{+0.067}$。最后，我们计算了$D_s^+\to\phi$衰变的极化参数和不对称参数。 显示英文摘要

摘要： The twist-2 distribution amplitude of the $\phi$-meson has attracted considerable interest due to its unique properties. In this work, we construct the transverse leading-twist light-cone distribution amplitude (LCDA) $\phi_{2;\phi}^\bot(x,\mu_0)$ of the $\phi$-meson using the light-cone harmonic oscillator (LCHO) model, in which a parameter $B_{2;\phi}^\bot$ dominantly control its longitudinal distribution. To explicitly isolate different twist contributions, we employ the right-handed chiral correlator for the QCD light-cone sum rules (LCSR) calculation of $D_s^+\to\phi$ decays, and further, we get the branching fraction, $\mathcal{B}(D_s^+ \to \phi e^+\nu_e )= (2.271_{-0.243}^{+0.291})\times 10^{-2}$ and $\mathcal{B}(D_s^+ \to \phi \mu^+\nu_\mu )=(2.250_{-0.240}^{+0.287})\times 10^{-2}$, where errors are squared average of the mentioned error sources. Furthermore, we have extracted the Cabbibo-Kobayashi-Maskawa (CKM) matrix element $|V_{cs}|=0.975_{-0.066}^{+0.067}$ with improved precision through the analysis. Finally, we calculated the polarization parameter and asymmetry parameter for the $D_s^+\to\phi$ decays.