Studying radiative baryon decays with the SU(3) flavor symmetry,Journal of Physics G: Nuclear and Particle Physics

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Studying radiative baryon decays with the SU(3) flavor symmetry
Journal of Physics G: Nuclear and Particle Physics ( IF 3.4 ) Pub Date : 2021-06-18 , DOI: 10.1088/1361-6471/abffdd
Ru-Min Wang ₁ , Xiao-Dong Cheng ₂ , Ying-Ying Fan ₂ , Jie-Lei Zhang ₂ , Yuan-Guo Xu ₁

Affiliation

The weak and electromagnetic radiative baryon decays of octet T ₈, decuplet T ₁₀, single charmed antitriplet T _c3 and sextet T _c6, and single heavy bottomed antitriplet T _b3 and sextet T _b6 are investigated by using the SU(3) flavor symmetry irreducible representation approach. We analyze the contributions from a single quark transition q ₁ → q ₂ γ and the W exchange transitions and find that the amplitudes could be easily related by the SU(3) flavor symmetry in the T _b3,b6, T _c3,c6, and T ₁₀ weak radiative decays as well as T ₁₀ → T ₈ γ electromagnetic decays. Nevertheless, the amplitude relations are a little complex in the ${T}_{8}\to {T}_{8}^{\prime }\gamma$ and T ₈ → T ₁₀ γ weak decays due to the quark antisymmetry in the octet T ₈ and the W exchange contributions. The predictions for the branching ratios of ${{\Lambda}}_{b}^{0}\to n\gamma$ , ${{\Xi}}_{b}^{-}\to {{\Xi}}^{-}\gamma$ , ${{\Xi}}_{b}^{-}\to {{\Sigma}}^{-}\gamma$ , ${{\Xi}}_{b}^{0}\to {{\Sigma}}^{0}\gamma$ , ${{\Xi}}_{b}^{0}\to {{\Lambda}}^{0}\gamma$ , ${{\Xi}}_{b}^{0}\to {{\Xi}}^{0}\gamma$ , Ξ* → Ξγ, Σ^∗0 → Σ⁰ γ, Δ⁰ → nγ and Δ⁺ → pγ are given by the relevant experimental data. The seven predictions of $\mathcal{B}\left({T}_{c3}\to {T}_{8}\gamma \right)$ are obtained by using previous other theoretical predictions of $\mathcal{B}\left({{\Lambda}}_{c}^{+}\to {{\Sigma}}^{+}\gamma \right)$ . The results in this work can be used to test the SU(3) flavor symmetry approach in the radiative baryon decays by the future experiments at BESIII, LHCb and Belle-II.

中文翻译：

研究具有 SU(3) 风味对称性的辐射重子衰变

八位位组的弱和电磁辐射重子衰变Ť ₈，decuplet Ť ₁₀，单粲antitriplet Ť _Ç₃和六重峰Ť _Ç₆，和单重有底antitriplet Ť _b₃和六重峰Ť _b₆通过使用SU进行了研究（3）风味对称不可约表示方法。我们分析了单个夸克跃迁q ₁ → q ₂γ和W 交换跃迁并发现振幅可以很容易地与T _b_3、_b₆、T _c_3、_c₆和T ₁₀弱辐射衰减以及T ₁₀ → T ₈γ 中的 SU(3) 风味对称性相关电磁衰减。尽管如此，振幅关系是在一个小的复杂和Ť ₈ → Ť ₁₀γ弱衰减归因于该八位位组的夸克反对称Ť ₈和w ^ ${T}_{8}\to {T}_{8}^{\prime }\gamma$ 交流贡献。 ${{\Lambda}}_{b}^{0}\to n\gamma$ , ${{\Xi}}_{b}^{-}\to {{\Xi}}^{-}\gamma$ , ${{\Xi}}_{b}^{-}\to {{\Sigma}}^{-}\gamma$ , ${{\Xi}}_{b}^{0}\to {{\Sigma}}^{0}\gamma$ , ${{\Xi}}_{b}^{0}\to {{\Lambda}}^{0}\gamma$ , ${{\Xi}}_{b}^{0}\to {{\Xi}}^{0}\gamma$ , Ξ* → Ξ γ , Σ ^{∗ 0} → Σ ⁰ γ , Δ ⁰ → nγ和 Δ ⁺ → pγ的分支比的预测由相关实验数据给出。的七个预测 $\mathcal{B}\left({T}_{c3}\to {T}_{8}\gamma \right)$ 是通过使用先前的其他理论预测获得的 $\mathcal{B}\left({{\Lambda}}_{c}^{+}\to {{\Sigma}}^{+}\gamma \right)$ 。这项工作的结果可用于在 BESIII、LHCb 和 Belle-II 的未来实验中测试辐射重子衰变中的 SU(3) 风味对称方法。

更新日期：2021-06-18

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