Symmetry (Oct 2021)
QED-Corrections to Weak Decays
Abstract
Important aspects of QED-corrections to hadronic decays are reviewed with emphasis on conceptual points such as infrared divergences and structure dependence. These matter are illustrated for the e+e−→hadrons, the leptonic decay π+→ℓ+ν¯ and the semileptonic decay B→πℓ+ν¯. Aspects of structure dependence include the (non)-cancellation of hard-collinear logs (e.g., lnmℓ and lnmπ) of charged final states.
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