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arXiv 1008.3175hep-ph
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QCD中稀有半轻子$B_{s}$衰变为$η$和$η'$介子

Rare Semileptonic $B_{s}$ Decays to $η$ and $η'$ mesons in QCD

K. Azizi, R. Khosravi, F. Falahati

摘要:

我们分析了罕见的半轻子$B_s \to (η, η') l^+ l^-$,$(l=e, μ, τ)$和$B_s \to (η, η') ν\barν$跃迁,利用三点QCD求和规则探讨了$η$和$η'$介子的$\bar s s$含量.我们计算负责这些过渡的形式因素在完整的理论。利用得到的形状因子,我们还估计了相关的分支分数和纵向轻子极化不对称性。我们的结果是在一个很好的一致性与其他现有的非微扰方法的预测。

英文摘要:

We analyze the rare semileptonic $B_s \to (η, η') l^+ l^-$, $(l=e, μ, τ)$ and $B_s \to (η, η') ν\barν$ transitions probing the $\bar s s$ content of the $η$ and $η'$ mesons via three--point QCD sum rules. We calculate responsible form factors for these transitions in full theory. Using the obtained form factors, we also estimate the related branching fractions and longitudinal lepton polarization asymmetries. Our results are in a good consistency with the predictions of the other existing nonperturbative approaches.

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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