In this thesis, we investigate corrections to the QCD factorization approach in exclusive B decays and study their relevance for future precision analyses. We consider B to vacuum correlation functions in analogy to the radiative B → γ Ι ν decay and estimate subleading power corrections using an operator product expansion and dispersion relations. For non-leptonic B → M1 M2 decays into light final states, we derive a unified QCD×QED factorization framework and calculate the behaviour of hadronic matrix elements under scale evolution.
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In this thesis, we investigate corrections to the QCD factorization approach in exclusive B decays and study their relevance for future precision analyses. We consider B to vacuum correlation functions in analogy to the radiative B → γ Ι ν decay and estimate subleading power corrections using an operator product expansion and dispersion relations. For non-leptonic B → M1 M2 decays into light final states, we derive a unified QCD×QED factorization framework and calculate the behaviour of hadronic...
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