arXiv 2008.066242020-08-15hep-ph

用SU（3）味对称性研究辐射重子衰变

Studying Radiative Baryon Decays with the SU(3) Flavor Symmetry

Ru-Min Wang, Xiao-Dong Cheng, Ying-Ying Fan, Jie-Lei Zhang, Yuan-Guo Xu

备注：: 17 pages, 2 figures

摘要：

用SU（3）味对称不可约表示方法研究了八重态$T_{8}$、十重态$T_{10}$、单粲反三重态$T_{c3}$和六重态$T_{c6}$、单重底反三重态$T_{b3}$和六重态$T_{b6}$的弱辐射和电磁辐射重子衰变.我们分析了单夸克跃迁$q_1\to q_2γ$和$W$交换跃迁的贡献，发现在$T_{b3,b6}$弱辐射衰变、$T_{c3,c6}$弱辐射衰变、$T_{10}\to T_{8}γ$弱衰变、$T_{10}\to T'_{10}γ$弱衰变和$T_{10}\to T_{8}γ$电磁衰变中，振幅可以很容易地与SU（3）味对称性联系起来.然而，由于$T_{8}$和$W$交换贡献中的夸克反对称性，在$T_{8}\to T'_{8}γ$和$T_{8}\to T_{10}γ$弱衰变中，振幅关系有点复杂。给出了$Λ^{0}_b\to nγ$、$Ξ^{-}_b\to Ξ^-γ$、$Ξ^{-}_b\to Σ^-γ$、$Ξ^{0}_b\to Σ^0γ$、$Ξ^{0}_b\to Λ^0γ$、$Ξ^{0}_b\to Ξ^0γ$、$Ξ^{*}\to Ξγ$、$Σ^{*0}\to Σ^{0}γ$、$Δ^0\to nγ$和$Δ^+\to pγ$分支比的预测。这些结果可用于BESIII、LHCb和Belle-II实验中检验SU（3）味对称性方法在辐射重子衰变中的应用。

英文摘要：

The weak and electromagnetic radiative baryon decays of octet $T_{8}$, decuplet $T_{10}$, single charmed anti-triplet $T_{c3}$ and sextet $T_{c6}$, single heavy bottomed anti-triplet $T_{b3}$ and sextet $T_{b6}$ are investigated by using SU(3) flavor symmetry irreducible representation approach. We analyze the contributions from a single quark transition $q_1\to q_2γ$ and $W$ exchange transitions, and find that the amplitudes could be easily related by SU(3) flavor symmetry in the $T_{b3,b6}$ weak radiative decays, $T_{c3,c6}$ weak radiative decays, $T_{10}\to T_{8}γ$ weak decays, $T_{10}\to T'_{10}γ$ weak decays and $T_{10}\to T_{8}γ$ electromagnetic decays. Nevertheless, the amplitude relations are a little complex in the $T_{8}\to T'_{8}γ$ and $T_{8}\to T_{10}γ$ weak decays due to quark antisymmetry in $T_{8}$ and $W$ exchange contributions. Predictions for branching ratios of $Λ^{0}_b\to nγ$, $Ξ^{-}_b\to Ξ^-γ$, $Ξ^{-}_b\to Σ^-γ$, $Ξ^{0}_b\to Σ^0γ$, $Ξ^{0}_b\to Λ^0γ$, $Ξ^{0}_b\to Ξ^0γ$, $Ξ^{*}\to Ξγ$, $Σ^{*0}\to Σ^{0}γ$, $Δ^0\to nγ$ and $Δ^+\to pγ$ are given. The results in this work can be used to test SU(3) flavor symmetry approach in the radiative baryon decays by the future experiments at BESIII, LHCb and Belle-II.

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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英文摘要：

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