论文标题
$ d^*dρ$和$ b^*bρ$ pline-cone sum规则中的强耦合
$D^*Dρ$ and $B^*Bρ$ strong couplings in light-cone sum rules
论文作者
论文摘要
我们提出了对强耦合常数的改进计算，$ g_ {d^*dρ} $和$ g_ {b^*bρ} $在轻单和总和规则中，包括使用$ρ$梅森分布的单循环QCD校正领先功率的校正。我们进一步计算了从两粒子和三粒子高扭贡献的转向式校正，并在扭曲4精度上进行了领先顺序。领先功率贡献的临近领先顺序校正将转速功率校正抵消到某些延伸的转速校正，而我们的数值结果与先前的总规则中的工作一致。我们的结果与现有模型依赖性估计之间的比较。
We present an improved calculation of the strong coupling constants $g_{D^*Dρ}$ and $g_{B^*Bρ}$ in light-cone sum rules including the one-loop QCD corrections of leading power with $ρ$ meson distribution amplitudes. We further compute the subleading-power corrections from two-particle and three-particle higher-twist contributions at leading order up to twist-4 accuracy. The next-to leading order corrections to leading power contribution offset the subleading-power corrections to some extend numerically, and our numerical results are consistent with previous works from sum rules. The comparisons between our results and the existing model-dependent estimations are also made.
