论文标题
半蛋白质的baryonic $ b $衰减
Semileptonic baryonic $B$ decays
论文作者
论文摘要
我们研究了半雌科$ b \ to {\ bf b \ bar b'} l \ bar l'$用$ \ bf b \ b \ bar b'$（$ l \ bar l'$）代表一对巴里昂（Lepton）对。使用$ b \ to {\ bf b \ bar b'} $过渡形式的新确定，我们获得了$ {\ cal b}（b^ - \ to p \ barpμ^ - \barν_μ）=（5.4 \ pm 2.0）此外，$ {\ cal b}（b^ - \toλ\ barpν\barν）=（3.5 \ pm 1.0）\ times 10^{ - 8} $的计算为比以前的预测小20倍。特别是，我们预测$ {\ cal b}（\ bar b^0_s \ to p \barλe^ - \barν_e，p \barλμ^ - \ barven_μ，p \barλτ^ - \barλτ^ - \barν__ $ {\ cal b}（\ bar b^0_s \toλ\barλν\barν）=（0.8 \ pm 0.2）\ times 10^{ - 8} $，LHCB实验可以访问。
We study the semileptonic $B\to{\bf B\bar B'}L\bar L'$ decays with $\bf B\bar B'$ ($L\bar L'$) representing a baryon (lepton) pair. Using the new determination of the $B\to{\bf B\bar B'}$ transition form factors, we obtain ${\cal B}(B^-\to p\bar p μ^-\bar ν_μ) =(5.4\pm 2.0)\times 10^{-6}$ agreeing with the current data. Besides, ${\cal B}(B^-\to Λ\bar p ν\bar ν)=(3.5\pm 1.0)\times 10^{-8}$ is calculated to be 20 times smaller than the previous prediction. In particular, we predict ${\cal B}(\bar B^0_s\to p\bar Λe^- \bar ν_e,p\bar Λμ^- \bar ν_μ,p\bar Λτ^- \bar ν_τ) =(2.1\pm 0.6,2.1\pm 0.6,1.7\pm 1.0)\times 10^{-6}$ and ${\cal B}(\bar B^0_s\to Λ\bar Λν\bar ν)=(0.8\pm 0.2)\times 10^{-8}$, which can be accessible to the LHCb experiment.
