Some recent developments in nonleptonic $B$ decays

Abstract

I report on three recent topics from the field of two-body nonleptonic decays of $B_{(s)}$ mesons. The computation of two-loop NNLO corrections to the leading penguin amplitudes in QCD factorisation, puzzles that have emerged in colour-allowed tree-level decays to heavy-light final states, and a combination of QCD factorisation with $SU(3)$ flavour symmetry to estimate the size of weak-annihilation amplitudes.

Comments: 10 pages, 3 figures, 2 tables, contribution to the 11th International Workshop on the CKM Unitarity Triangle (CKM2021)