Precise measurements of branching fractions for D_s^+ meson decays to two pseudoscalar mesons
arxiv(2020)
摘要
We measure the branching fractions for seven D_s^+ two-body decays to pseudo-scalar mesons, by analyzing data collected at √(s) = 4 . 178 ∼ 4 . 226 GeV with the BESIII detector at the BEPCII collider. The branching fractions are determined to be [ ℬ(D_s^+→K^+η')=(2.68± 0.17± 0.17± 0.08)×10^-3,; ℬ(D_s^+→η'π^+)=(37.8± 0.4± 2.1± 1.2)×10^-3,; ℬ(D_s^+→K^+η)=(1.62± 0.10± 0.03± 0.05)×10^-3,; ℬ(D_s^+→ηπ^+)=(17.41± 0.18± 0.27± 0.54)×10^-3,; ℬ(D_s^+→K^+K_S^0)=(15.02± 0.10± 0.27± 0.47)×10^-3,; ℬ(D_s^+→K_S^0π^+)=(1.109± 0.034± 0.023± 0.035)×10^-3,; ℬ(D_s^+→K^+π^0)=(0.748± 0.049± 0.018± 0.035)×10^-3, ] where the first uncertainties are statistical, the second are systematic, and the third are from external input branching fraction of the normalization mode D_s^+ → K + K − π + . Precision of our measurements is significantly improved compared with that of the current world average values.
更多查看译文
关键词
Branching fraction, Charm physics, e(+)-e(-) Experiments
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要