Weak annihilation and new physics in charmless B→MM decays

Bobeth, Christoph (Technische Universität München, Institute for Advanced Study, Lichtenbergstraße 2a, 85748, Garching, Germany) ; Gorbahn, Martin (Department of Mathematical Sciences, University of Liverpool, L69 3BX, Liverpool, UK) ; Vickers, Stefan (Technische Universität München, Excellence Cluster Universe, Boltzmannstraße 2, 85748, Garching, Germany)

21 July 2015

Abstract: 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 “ ΔACP puzzle”, and some tensions in B→K∗ϕ . Beyond the standard model, we simultaneously determine weak-annihilation and new-physics parameters from data, employing model-independent scenarios that address the “ ΔACP 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.

Published in: EPJC 75 (2015) 340
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-015-3535-1
License: CC-BY-3.0

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