论文标题
$ b $ -Meson发行幅度的参数的QCD总和规则
QCD sum rules for parameters of the $B$-meson distribution amplitudes
论文作者
论文摘要
We obtain new estimates for the parameters $λ_{E}^2$, $λ_H^2$ and their ratio $\mathcal{R} = λ_{E}^2/λ_H^2$, which appear in the second moments of the $B$-meson light-cone distribution amplitudes defined in the heavy-quark effective field theory.该计算基于对角线相关函数的两点QCD总规则，其中包括运算符产品扩展中质量七的所有贡献。对于该比率，我们得到$ \ Mathcal {r} =（0.1 \ pm 0.1）$，$λ_H^2 =（0.15 \ pm 0.05）\，\ text {gev}^2 $ and $λ_e^2 =（0.01 \ pm 0.01 \ pm 0.01）
We obtain new estimates for the parameters $λ_{E}^2$, $λ_H^2$ and their ratio $\mathcal{R} = λ_{E}^2/λ_H^2$, which appear in the second moments of the $B$-meson light-cone distribution amplitudes defined in the heavy-quark effective field theory. The computation is based on two-point QCD sum rules for the diagonal correlation function and includes all contributions up to mass dimension seven in the operator-product expansion. For the ratio we get $\mathcal{R} = (0.1 \pm 0.1)$ with $λ_H^2 = (0.15 \pm 0.05) \, \text{GeV}^2$ and $λ_E^2 = (0.01 \pm 0.01) \, \text{GeV}^2$.
