2014/09/10 by Bobeth, Christoph, Gorbahn, Martin, Vickers, Stefan
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.1409.3252
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→ K π 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→ s uu current-current operators. We discuss also possibilities that allow further tests of our assumption once improved measurements from LHCb and Belle II become available.