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arXiv 2112.02481hep-phhep-ex
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强子谱支持的底重子${Ξ_b}$和${Ω_b}$的色允许二体非轻子衰变的再研究

Restudy of the color-allowed two-body nonleptonic decay of bottom baryons ${Ξ_b}$ and ${Ω_b}$ supported by hadron spectroscopy

Yu-Shuai Li, Xiang Liu

摘要:

本文计算了底重子的色允许两体非轻子衰变的分支比,包括发射赝标介子($π^{-}$,$K^{-}$,$D^{-}$,和$D_s^{-}$)或矢量介子($ρ^{-}$,$K^{*-}$,$D^{*-}$,和$D_s^{*-}$)的$Ξ_b\to Ξ_c^{(*)}$和$Ω_b\to Ω_c^{(*)}$弱跃迁.为了实现这一目标,我们采用了三体光阵面夸克模型与强子谱的支持,其中这些重子的空间波函数参与这些弱衰变是由一个半相对论性的潜力模型与高斯展开方法得到的。我们的研究结果表明,这些衰变与$π^-$,$ρ^-$,和$D_s^{(*)-}$发射模式有相当大的宽度,这可能是在正在进行的LHCb和Belle II实验。

英文摘要:

In this work, we calculate the branching ratios of the color-allowed two-body nonleptonic decays of the bottom baryons, which include the $Ξ_b\to Ξ_c^{(*)}$ and $Ω_b\to Ω_c^{(*)}$ weak transitions by emitting a pseudoscalar meson ($π^{-}$, $K^{-}$, $D^{-}$, and $D_s^{-}$) or a vector meson ($ρ^{-}$, $K^{*-}$, $D^{*-}$, and $D_s^{*-}$). For achieving this aim, we adopt the three-body light-front quark model with the support of hadron spectroscopy, where the spatial wave functions of these heavy baryons involved in these weak decays are obtained by a semirelativistic potential model associated with the Gaussian expansion method. Our results show that these decays with the $π^-$, $ρ^-$, and $D_s^{(*)-}$-emitted mode have considerable widths, which could be accessible at the ongoing LHCb and Belle II experiments.

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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