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arXiv 2102.03703hep-ex
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最近的魅力结果来自Belle

Recent charm results from Belle

Longke Li

摘要:

本文介绍了Belle实验的最新结果,包括(1)首次测量了$CP$ -奇衰变中的混合参数$y_{CP}=(0.96\pm0.91\pm 0.62^{+0.17}_{-0.00})\%$,(2)首次对$D^0\to K^-π^+η$进行了Dalitz图分析,(3)测量了$Λ_c^+\toηΛ^0π^+$和$ηΣ^0π^+$的分支分数以及中间过程$Λ_c^+\to[Λ(1670)\toηΛ^0]π^+$和$Λ_c^+\toηΣ(1385)^+$相对于$Λ_c^+\to p K^-π^+$的分支分数:$0.293\pm0.003\pm0.014$、$0.120\pm0.006\pm0.006$、$(5.54\pm0.29\pm0.73)\times10^{-2}$和$0.192\pm 0.006\pm 0.016$的计算;(4)首次确定了粲奇异重子$Ξ_c(2970)^+$的自旋和宇称,与HQSS对$J^P(s_l)=1/2^+(0)$的预言一致。

英文摘要:

Recent charm results from Belle experiment are presented in this proceedings, including (1) measurement of mixing parameter $y_{CP}=(0.96\pm0.91\pm 0.62^{+0.17}_{-0.00})\%$ in $CP$-odd decay for the first time, (2) the first Dalitz-plot analysis of $D^0\to K^-π^+η$, (3) measurement of branching fractions of $Λ_c^+\toηΛ^0π^+$ and $ηΣ^0π^+$ and intermediate processes $Λ_c^+\to[Λ(1670)\toηΛ^0]π^+$ and $Λ_c^+\toηΣ(1385)^+$ relative to $Λ_c^+\to p K^-π^+$: $0.293\pm0.003\pm0.014$, $0.120\pm0.006\pm0.006$, $(5.54\pm0.29\pm0.73)\times10^{-2}$, and $0.192\pm 0.006\pm 0.016$, respectively, and (4) first determination of the spin and parity of a charmed-strange baryon $Ξ_c(2970)^+$ which is consistent with the HQSS prediction for $J^P(s_l)=1/2^+(0)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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