论文标题
$ω_c^0 \ toξ^-l^+ν_l$的半衰减衰减来自轻单元总和规则
Semileptonic Decay of $Ω_c^0 \to Ξ^- l^+ ν_l$ From Light-Cone Sum Rules
论文作者
论文摘要
$ω_c$至$ξ$的弱衰减过程是在QCD轻单和规则的方法中计算出来的。 $ω_c^0 \至ξ^ - l^+ν_l$及其衰减分支比的衰减宽度也通过此工作计算的形式计算。对于Twist-6分布幅度，形式因素$ f_1 = 0.66 \ pM0.02，f_2 = -0.76 \ pm0.03，g_1 = 0.06 \ pm0.01 $ and $ g_2 = -0.44 \ pm0.01 \ pm0.01 $在零后流点处给出。 $ω_c^0 \ toξ^-l^+ν_l$的半衰减宽度的结果是$γ=（7.51 \ pm0.36）\ times10^{ - 15}〜{\ rm {gev}} $，以及分支分支分支比率的预测$ br（ω_c^0 \toξ^-l^+ν_l）=（3.06 \ pm0.15）\ times10^{ - 3} $。这些结果与其他作品非常吻合，并且衰减宽度和分支比率得到改善。这种不太小的分支比为探索未来实验的衰减通道提供了一个很好的方向。
The weak decay process of $Ω_c$ to $Ξ$ is calculated in the method of QCD light-cone sum rule. The decay width of $Ω_c^0 \to Ξ^- l^+ ν_l$ and its decay branching ratio are also calculated with the form factors from this work's calculation. To the twist-6 distribution amplitudes, the form factors $f_1=0.66\pm0.02, f_2=-0.76\pm0.03, g_1=0.06\pm0.01$ and $g_2=-0.44\pm0.01$ are given at zero recoil point. The result of the semileptonic decay width of $Ω_c^0 \to Ξ^-l^+ν_l$ is $Γ=(7.51\pm0.36)\times10^{-15}~{\rm{GeV}}$ , and the prediction of the decay branching ratio $Br(Ω_c^0\toΞ^-l^+ν_l)=(3.06\pm0.15)\times10^{-3}$. These results fit well with other works, and the decay width and branching ratio are improved. This not too small branching ratio gives a good direction to explore this decay channel in the future experiments.
