期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP08(2022)020
关键词
Factorization; Renormalization Group; Specific QCD Phenomenology; Bottom Quarks
资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the Sino-German Collaborative Research Center Symmetries and the Emergence of Structure in QCD (DFG) [TRR110, 196253076]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the Sino-German Collaborative Research Center Symmetries and the Emergence of Structure in QCD (NSFC) [12070131001, TRR 110]
- German Research Foundation (DFG) within the German Excellence Strategy [39083149]
- Studienstiftung des deutschen Volkes
We discuss the QED-generalized leading-twist light-cone distribution amplitudes of heavy mesons and derive the one-loop anomalous dimension of these soft functions. We also study their behavior under renormalization-scale evolution.
We discuss the QED-generalized leading-twist light-cone distribution amplitudes of heavy mesons, that appear in QCD x QED factorization theorems for exclusive two-body B decays. In the presence of electrically charged particles, these functions should be more appropriately regarded as soft functions for heavy-meson decays into two back-to-back particles. In this paper, we derive the one-loop anomalous dimension of these soft functions and study their behaviour under renormalization-scale evolution, obtaining an exact solution in Laplace space. In addition, we provide numerical solutions for the soft functions and analytical solutions to all orders in the strong and to first order in the electromagnetic coupling. For the inverse (and inverse-logarithmic) moments, we obtain an all-order solution in both couplings. We further provide numerical estimates for QED corrections to the inverse moments.
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