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arXiv 1712.00566hep-phhep-exnucl-th
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半轻子重子衰变$D_s^+\to p\bar p e^+ ν_e$

The semileptonic baryonic decay $D_s^+\to p\bar p e^+ ν_e$

Hai-Yang Cheng, Xian-Wei Kang

摘要:

在末态中有质子-反质子对的衰变$D_s^+\to p \bar p e^+ν_e$是唯一的,因为它是在粲介子扇区中物理上唯一允许的半轻子重子衰变。它的测量将检验我们对半轻子$D_s^+$衰变和低能$p\bar p$相互作用的基本认识。考虑到$η, η', f_0(980)$和$X(1835)$的主要中间态贡献,我们发现它的分支分数在$10^{-9} \sim 10^{-8}$水平。$X(1835)$态的位置和性质对于精确测定支化分数至关重要。我们希望通过BESIII的更多数据以及未来的超级tau-charm工厂来引发新一轮的仔细研究。

英文摘要:

The decay $D_s^+\to p \bar p e^+ν_e$ with a proton-antiproton pair in the final state is unique in the sense that it is the only semileptonic baryonic decay which is physically allowed in the charmed meson sector. Its measurement will test our basic knowledge on semileptonic $D_s^+$ decays and the low-energy $p\bar p$ interactions. Taking into account the major intermediate state contributions from $η, η', f_0(980)$ and $X(1835)$, we find that its branching fraction is at the level of $10^{-9} \sim 10^{-8}$. The location and the nature of $X(1835)$ state are crucial for the precise determination of the branching fraction. We wish to trigger a new round of a careful study with the upcoming more data in BESIII as well as the future super tau-charm factory.

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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