Weak annihilation and new physics in charmless B → MM decays

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We use currently available data of nonleptonic charmless 2-body B→MM decays (MM=PP,PV,VV) that are mediated by b→(d,s) QCD- and QED-penguin operators to study weak annihilation and new-physics effects in the framework of QCD factorization. In particular we introduce one weak-annihilation parameter for decays related by (u↔d) quark interchange and test this universality assumption. Within the standard model, the data supports this assumption with the only exceptions in the B→Kπ system, which exhibits the well-known “(Formula presented.) puzzle”, and some tensions in (Formula presented.). Beyond the standard model, we simultaneously determine weak-annihilation and new-physics parameters from data, employing model-independent scenarios that address the “ΔA<inf>CP</inf> puzzle”, such as QED-penguins and b→su¯u current-current operators. We discuss also possibilities that allow further tests of our assumption once improved measurements from LHCb and Belle II become available.




Bobeth, C., Gorbahn, M., & Vickers, S. (2015). Weak annihilation and new physics in charmless B → MM decays. European Physical Journal C, 75(7). https://doi.org/10.1140/epjc/s10052-015-3535-1

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