论文标题
绝对分支的绝对分支分数的测量值14个专属的Hadronic $ d $衰减至$η$
Measurements of Absolute Branching Fractions of Fourteen Exclusive Hadronic $D$ Decays to $η$
论文作者
论文摘要
使用$ 2.93 \，\ rm fb^{ - 1} $的$ e^+e^ - $ collision数据以3.773 \ 3.773 \，GEV与besiii检测器获取的碰撞数据，我们报告了第一个测量的第一个测量$ d^0 \ to k^-π^+η$，$ k^0_sπ^0η$，$ k^+k^-η$，$ k^0_sk^0_sK^0_sη$，$ k^-π^-π^+π^0η$，$ k^0_Sπ^+π^+π^+π^-η$，$ k^0_s s^0_sπ^0 h $π^0η$π $ d^+\ to k^0_sπ^+η$，$ k^0_sk^+η$，$ k^-π^+π^+η$，$ k^0_sπ^+π^0η$，$π^+π^+π^+π^+π^ - η$，以及$π^+π^+π^0π^0η$。在这些衰减之中，$ d^0 \ to k^-π^+η$和$ d^+\ to k^0_sπ^+η$衰减具有最大的分支分数，即$ \ MATHCAL {B}（d^0 \ to K^-π^+η）=（1.853 \ PM0.0.0.0.0.0.0.0.025^__ {c Stat} \ pm0.031 _ {\ rm syst}）\％$和$ \ MATHCAL {B}（d^+\ to K^0_Sπ^+η）=（1.309 \ pm0.037 _ {\ rm Stat}}我们还确定$ CP $不对称的六个衰减，并获得最高的事件收率。找不到$ CP $违规的证据。
Using $2.93\,\rm fb^{-1}$ of $e^+e^-$ collision data taken at a center-of-mass energy of 3.773\,GeV with the BESIII detector, we report the first measurements of the absolute branching fractions of fourteen hadronic $D^{0(+)}$ decays to exclusive final states with an $η$, e.g., $D^0\to K^-π^+η$, $K^0_Sπ^0η$, $K^+K^-η$, $K^0_SK^0_Sη$, $K^-π^+π^0η$, $K^0_Sπ^+π^-η$, $K^0_Sπ^0π^0η$, and $π^+π^-π^0η$; $D^+\to K^0_Sπ^+η$, $K^0_SK^+η$, $K^-π^+π^+η$, $K^0_Sπ^+π^0η$, $π^+π^+π^-η$, and $π^+π^0π^0η$. Among these decays, the $D^0\to K^-π^+η$ and $D^+\to K^0_Sπ^+η$ decays have the largest branching fractions, which are $\mathcal{B} (D^0\to K^-π^+η)=(1.853\pm0.025_{\rm stat}\pm0.031_{\rm syst})\%$ and $\mathcal{B}(D^+\to K^0_Sπ^+η)=(1.309\pm0.037_{\rm stat}\pm0.031_{\rm syst})\%$, respectively. We also determine the $CP$ asymmetries for the six decays with highest event yields. No evidence of $CP$ violation is found.
