2025/10/21 by Riccardo Bartocci, Bartocci, Riccardo, Philipp Böer +3
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.2510.18811
We report on progress towards including next-to-leading order (NLO) radiative corrections to the subleading-power factorization formula for the Q1q-Q7γ interference contribution in B→ Xsγ at large photon energies, mb - 2Eγ= O(Λ\rm QCD). The novel ingredients for a NLO analysis are the one-loop anomalous dimension of the subleading shape function g17(ω,ω1;μ), which was recently computed by us, and the two-loop corrections to the jet function with an internal charm loop. Here we summarize the renormalization of g17(ω,ω1;μ), and further discuss that our insights allow for a simplified renormalization of a specific generalization of a three-particle B-meson light-cone distribution amplitude, but with non-aligned light-like separations of the fields.