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arXiv 0912.2226hep-ph
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半轻子bc到cc和bb到bc重子衰变与重夸克自旋对称性

Semileptonic bc to cc and bb to bc Baryon Decays and Heavy Quark Spin Symmetry

J. Nieves, J. M. Flynn, E. Hernandez

摘要:

我们研究了在$m_b, m_c \gg Λ_\mathrm{QCD}$极限和零反冲点附近,最低位$bc$重子到最低位$cc$重子($Ξ_{bc}^{(\prime*)}\to Ξ_{cc}^{(*)}$和$Ω_{bc}^{(\prime*)}\to Ω_{cc}^{(*)}$)的半轻子衰变.分离的重夸克自旋对称性使得用一个单一的形状因子来描述所有这些衰变成为可能。我们还展示了如何使用这些约束来测试不同的夸克模型计算的有效性。本文还讨论了$bb$到$bc$重子衰变。

英文摘要:

We study the semileptonic decays of the lowest-lying $bc$ baryons to the lowest-lying $cc$ baryons ($Ξ_{bc}^{(\prime*)}\to Ξ_{cc}^{(*)}$ and $Ω_{bc}^{(\prime*)}\to Ω_{cc}^{(*)}$), in the limit $m_b, m_c \gg Λ_\mathrm{QCD}$ and close to the zero recoil point. The separate heavy quark spin symmetries make it possible to describe all these decays using a single form factor. We also show how these constraints can be used to test the validity of different quark model calculations. $bb$ to $bc$ baryon decays are also discussed.

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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