B介子光锥分布振幅的电磁尾迹
Electromagnetic tails of $B$-meson light-cone distribution amplitudes
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中文总结 AI 辅助
该研究在重夸克有效理论框架下，分析B介子LCDAs的电磁修正，推导其大负动量区渐近行为的模型无关表达式，提出符合约束的唯象模型。
中文摘要 AI 辅助
我们在重夸克有效理论框架内，研究B介子衰变常数及光锥分布振幅（LCDAs）的电磁修正。QED效应的引入使LCDAs的支撑范围扩展至光锥动量的负值区域，我们阐明该区域与对电磁末态辐射敏感的QED推广衰变常数的关联。我们基于纯QCD定义的两粒子和三粒子LCDAs的积分，推导QED推广LCDAs Φ±(ω,μ)在大负动量区域渐近行为的模型无关表达式，证明Φ+的结果满足其满足的重整化群方程，并利用已知的一圈反常维度研究其演化。最后，我们提出一个符合这些约束的唯象模型。
英文摘要
We investigate electromagnetic corrections to the $B$-meson decay constant and light-cone distribution amplitudes (LCDAs) within the framework of heavy-quark effective theory. The inclusion of QED effects extends the support of the LCDAs to negative values of the light-cone momentum. We clarify the relation between this region and QED-generalized decay constants sensitive to electromagnetic final-state radiation. We derive model-independent expressions for the asymptotic behavior in the large negative-momentum region of the QED-generalized LCDAs $Φ_\pm(ω,μ)$ in terms of integrals over the two- and three-particle LCDAs defined in pure QCD. We show that our result for $Φ_+$ is consistent with the renormalization-group equation satisfied by this object and study its evolution using the known one-loop anomalous dimension. Finally, we propose a phenomenological model consistent with these constraints
发表机构
- Johannes Gutenberg University（约翰内斯·古腾堡大学）
- Cornell University（康奈尔大学）
机构由 AI 辅助整理，请以论文原文为准。
