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arXiv 0706.2805hep-ph
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半轻子bc到cc重子衰变与重夸克自旋对称性

Semileptonic bc to cc Baryon Decay and Heavy Quark Spin Symmetry

Jonathan M. Flynn, Juan Nieves

摘要:

本文研究了在m_b,m_c >> Lambda_{QCD}的极限和零反冲点附近,从最低位bc重子到最低位cc重子(Xi_{bc} ^{(\prime*)}--> Xi_{cc} ^{(*)}和Omega_{bc} ^{(\prime*)}--> Omega_{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。我们恢复的结果,以前由白色和萨维奇的方式,我们认为是更直接和平行的方法,后来应用到研究BC半轻子衰变。进一步讨论了bc重子衰变与Bc介子衰变到eta_c和J/π介子衰变的相似性,并讨论了描述各组衰变的单函数斜率之间的关系。我们的结果可以直接应用于bb重子到bc重子的衰变。

英文摘要:

We study the semileptonic decays of the lowest-lying bc baryons to the lowest-lying cc baryons (Xi_{bc}^{(\prime*)}--> Xi_{cc}^{(*)} and Omega_{bc}^{(\prime*)}--> Omega_{cc}^{(*)}), in the limit m_b, m_c >> Lambda_{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 recover results derived previously by White and Savage in a manner which we think is more straightforward and parallels the method applied later to study Bc semileptonic decays. We further discuss the resemblance between the bc baryon decays and those of Bc mesons to eta_c and J/ψmesons and comment on the relation between the slopes of the single functions describing each set of decays. Our results can straightforwardly be applied to the decays of bb baryons to bc baryons.

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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