论文标题
QCD辐射重中膜衰减的计算，并用超级校正功率校正
QCD calculations of radiative heavy meson decays with subleading power corrections
论文作者
论文摘要
我们通过在$α_s$中的twist-Two光子分布幅度（$α_s$ in the Sumpon-sum sum of Light-cone Sum sul of of Light-Cone Sum rules（LCSR））中包括twist-Two光子分布幅度（LCSR）的twist-Two光子分布幅度（LCSR），从而重新访问辐射重中膜衰减形式的质量。在逃生运算符的存在下，使用操作员产物扩张技术构建了真空与光子相关函数的所需的硬性分解公式。采用背景场方法，在LCSR框架中进一步计算了QCD的LCSR框架中进一步计算出来自两粒子和三粒子光子分布幅度的较高扭转校正，直到扭曲的精度为四。结合新派生的LCSR中的领先功率“类似点”光子的光子贡献和跨度功率解析的光子校正，我们更新了描述沉重中的电磁衰减过程的非扰动耦合的理论预测，这些耦合的重中均为重中的电磁衰减过程$ h^{ $ h^{\ ast \，0} \ to h^{0} \，γ$，$ h_s^{\ ast \，\ pm} \ to H_S^{\ pm} \，γ$（带有$ h = d，\ d，\，b $）。此外，我们根据不同的QCD方法和现象学模型对重中磁磁耦合的总和规则计算进行了探索性比较。
We revisit QCD calculations of radiative heavy meson decay form factors by including the subleading power corrections from the twist-two photon distribution amplitude at next-to-leading-order in $α_s$ with the method of the light-cone sum rules (LCSR). The desired hard-collinear factorization formula for the vacuum-to-photon correlation function with the interpolating currents for two heavy mesons is constructed with the operator-product-expansion technique in the presence of evanescent operators. Applying the background field approach, the higher twist corrections from both the two-particle and three-particle photon distribution amplitudes are further computed in the LCSR framework at leading-order in QCD, up to the twist-four accuracy. Combining the leading power "point-like" photon contribution at tree level and the subleading power resolved photon corrections from the newly derived LCSR, we update theory predictions for the nonperturbative couplings describing the electromagnetic decay processes of the heavy mesons $H^{\ast \, \pm} \to H^{\pm} \, γ$, $H^{\ast \, 0} \to H^{0} \, γ$, $H_s^{\ast \, \pm} \to H_s^{\pm} \, γ$ (with $H=D, \, B$). Furthermore, we perform an exploratory comparisons of our sum rule computations of the heavy-meson magnetic couplings with the previous determinations based upon different QCD approaches and phenomenological models.
