论文标题
$ d_s^+ \toπ^0 \ ell^+ en^+ en g el $的半衰减通过中性介子混合
Semileptonic Decay of $D_s^+\to π^0 \ell^+ ν_\ell$ Via Neutral Meson Mixing
论文作者
论文摘要
Based on the mechanism of neutral meson mixing, we predict the branching fraction of the semileptonic decay of $D_s^+\to π^0 \ell^+ ν_\ell$ ($\ell=e$, $μ$) using recently measured branching fraction of $D_s^+\to ηe^+ν_e$ by BESIII experiment .我们还提供了一个公式，可以用统一的方式描述$π^0 $，$η$，$η$，$η'$，$η'$，$η'$，$η'$，$η$ g $的中性介子混合。预测的分支分数为$ d_s^+\toπ^0 e^+ν_e$衰减是$ \ MATHCAL {B}（d_s^+\toπ^0 E^+ν_e）=（2.65 \ pm 0.38）\ times times 10^{ - 5} $。在实验中搜索衰减$ d_s^+\ toπ^0 \ ell^+en \ ell $，以了解$ d_s^+\toπ^0 $ to的机制，以半蛋白质衰变中的过渡。我们还估计了$ d_s^+\至π^0τ+ν_τ$的分支分数，这是唯一允许的迷人梅森（Charmed Meson）的半衰减模式，因为$ d_s^+$ erson的质量价值略高于$ d_s^+$ $ erson略高于$π^0τ+$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $。
Based on the mechanism of neutral meson mixing, we predict the branching fraction of the semileptonic decay of $D_s^+\to π^0 \ell^+ ν_\ell$ ($\ell=e$, $μ$) using recently measured branching fraction of $D_s^+\to ηe^+ν_e$ by BESIII experiment . We also give a formula that can describe the neutral meson mixing of $π^0$, $η$, $η'$ and a pseudoscalar gluonium $G$ in a unified way. The predicted branching fraction of $D_s^+\toπ^0 e^+ν_e$ decay is $\mathcal{B}(D_s^+\toπ^0 e^+ν_e)=(2.65\pm 0.38)\times 10^{-5}$. It is important to search for the decay $D_s^+\to π^0 \ell^+ ν_\ell$ in experiment, in order to understand the mechanism of $π^0$ production in $D_s^+\toπ^0$ transition in semileptonic decay. We also estimate the branching fraction of $D_s^+\to π^0τ^+ν_τ$, which is the only kinematically allowed semi-tauonic decay mode of the charmed meson, since the mass value of $D_s^+$ meson is just slightly above the threshold of $π^0τ^+$ generation in the semi-tauonic decay.
