论文标题
部分可观测时空混沌系统的无模型预测
Measurements of branching fractions of $Λ_c^+ \to Σ^+ η$ and $Λ_c^+ \to Σ^+ η'$ and asymmetry parameters of $Λ_c^+ \to Σ^+ π^0$, $Λ_c^+ \to Σ^+ η$, and $Λ_c^+ \to Σ^+ η'$
论文作者
论文摘要
我们将$λ_C^+ \的研究报告为σ^+π^0 $，$λ_C^+ \ toσ^+η$，以及$λ_C^+ \ toσ^+η'$，使用与980 $ \ rm fb^{ - 1} $ cultector的综合亮度相对应的数据样本，与Belke的coltection-atement a cultection-atement a in-fluse。 $ e^+e^ - $ collider。相对于$λ_C^+ \至σ^+π^0 $的分支分数测量为：$ \ natcal {b} _ {λ_c^+ \ toσ^+η}/\ qutatcal {b} $ \ MATHCAL {B} _ {λ_C^+ \ toσ^+η'}/\ Mathcal {B} _ {λ_C^+ \ toσ^+π^0} = 0.33 \ 0.33 \ pm pm pm pm 0.02 $。使用$ \ MATHCAL {B} _ {λ_C^+ \ toσ^+π^0} =（1.25 \ pm 0.10）\％$，我们获得$ \ Mathcal {b} _ {λ_c^+ \ toσ^+η} 0.25）\ times10^{ - 3} $和$ \ Mathcal {b} _ {λ_c^+ \ toσ^+η'} =（4.16 \ pm 0.75 \ pm 0.21 \ pm 0.21 \ pm 0.33）\ times10^{ - 3} $。在这里，不确定性分别是统计，系统的，并且分别来自$ \ Mathcal {B} _ {λ_c^+ \ toσ^+π^0} $。相对于$λ_C^+ \与σ^+η'$相对于$λ_C^+ \ \σ^+η$的分支分数的比率为$ \ MATHCAL {B} _ {b} _ {λ_c^+ \ toσ^+ t toσ^+η}/\η}/\ MathCAL} η} = 1.34 \ pm 0.28 \ pm 0.06 $。我们将$λ_C^+ \的不对称参数更新为σ^+π^0 $，$α_{σ^+π^0} = -0.48 \ pm 0.02 \ pm 0.02 $，具有相当大的提高精度。 The asymmetry parameters of $Λ_c^+ \to Σ^+ η$ and $Λ_c^+ \to Σ^+ η'$ are measured to be $α_{Σ^+ η} = -0.99 \pm 0.03 \pm 0.05$ and $α_{Σ^+ η'} = -0.46 \pm 0.06 \pm 0.03$这是第一次。
We report a study of $Λ_c^+ \to Σ^+ π^0$, $Λ_c^+ \to Σ^+ η$, and $Λ_c^+ \to Σ^+ η'$ using the data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The branching fractions relative to $Λ_c^+ \to Σ^+ π^0$ are measured as: $\mathcal{B}_{Λ_c^+ \to Σ^+ η}/\mathcal{B}_{Λ_c^+ \to Σ^+ π^0}=0.25 \pm 0.03 \pm 0.01$ and $\mathcal{B}_{Λ_c^+ \to Σ^+ η'}/\mathcal{B}_{Λ_c^+ \to Σ^+ π^0}=0.33 \pm 0.06 \pm 0.02$. Using $\mathcal{B}_{Λ_c^+ \to Σ^+ π^0}=(1.25 \pm 0.10)\%$, we obtain $\mathcal{B}_{Λ_c^+ \to Σ^+ η}=(3.14 \pm 0.35 \pm 0.11 \pm 0.25)\times10^{-3}$ and $\mathcal{B}_{Λ_c^+ \to Σ^+ η'}=(4.16 \pm 0.75 \pm 0.21 \pm 0.33)\times10^{-3}$. Here the uncertainties are statistical, systematic, and from $\mathcal{B}_{Λ_c^+ \to Σ^+ π^0}$, respectively. The ratio of the branching fraction of $Λ_c^+ \to Σ^+ η'$ with respect to that of $Λ_c^+ \to Σ^+ η$ is measured to be $\mathcal{B}_{Λ_c^+ \to Σ^+ η'}/\mathcal{B}_{Λ_c^+ \to Σ^+ η}=1.34 \pm 0.28 \pm 0.06$. We update the asymmetry parameter of $Λ_c^+ \to Σ^+ π^0$, $α_{Σ^+ π^0} = -0.48 \pm 0.02 \pm 0.02$, with a considerably improved precision. The asymmetry parameters of $Λ_c^+ \to Σ^+ η$ and $Λ_c^+ \to Σ^+ η'$ are measured to be $α_{Σ^+ η} = -0.99 \pm 0.03 \pm 0.05$ and $α_{Σ^+ η'} = -0.46 \pm 0.06 \pm 0.03$ for the first time.
