论文标题
轻正面夸克模型中抗三重底底重子的辐射衰减较弱
Weak Radiative Decays of Anti-triplet Bottomed Baryons in Light-Front Quark Model
论文作者
论文摘要
我们研究了$ {\ bf b} _b \ to {\ bf b}_nγ$的弱辐射衰减，并使用$ {\ bf b} _ {b（n）} $ the Anti-Triplet-Bottom（Octet）在轻质量Quark模型中。我们获得了$ {\ cal b}（λ_b\toλγ）=（7.1 \ pm 0.3）\ times 10 ^{ - 6} $，这与当前的实验值$（7.1 \ pm 1.7）\ times 10 ^{ - 6} $非常吻合。我们预测$ {\ cal b}（ξ_b^0 \ toξ^0γ）=（1.0 \ pm 0.1）\ times 10^{ - 5} $和$ {\ cal b}（ξ_b^ - \ to to至ξ^ - γ）=（1.1 \ pm 0.1）\ pm 0.1 \ pm 0.1 \ pm 0.1） 合作。此外，我们发现，与$ b \ todγ$过渡相关的模式的$ su（3）_f $风味对称性破坏效果可能会高达$ 20 \％$。
We study the weak radiative decays of ${\bf B}_b \to {\bf B}_n γ$ with ${\bf B}_{b(n)} $ the anti-triplet-bottom (octet) baryons in the light front quark model. We obtain that ${\cal B}(Λ_b \to Λγ)= (7.1 \pm 0.3 )\times 10 ^{-6}$, which agrees well with the current experimental value of $(7.1 \pm 1.7 )\times 10 ^{-6}$. We predict that ${\cal B}(Ξ_b^0 \to Ξ^0 γ)= (1.0 \pm 0.1 )\times 10 ^{-5}$ and ${\cal B}(Ξ_b^- \to Ξ^- γ) = (1.1 \pm 0.1) \times 10^{-5}$, which are consistent with the latest upper limits set by the LHCb collaboration. In addition, we find that the $SU(3)_F$ flavor symmetry breaking effects for the modes related to the $b\to d γ$ transition can be as large as $20\%$.
