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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Weak annihilation and new physics in charmless [Formula: see text] decays
Christoph Bobeth1, Martin Gorbahn2, Stefan Vickers3
1Technische Universität München, Institute for Advanced Study, Lichtenbergstraße 2a, 85748 Garching, Germany.
Abstract:
We use currently available data of nonleptonic charmless 2-body [Formula: see text] decays ([Formula: see text]) that are mediated by [Formula: see text] 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 [Formula: see text] quark interchange and test this universality assumption. Within the standard model, the data supports this assumption with the only exceptions in the [Formula: see text] system, which exhibits the well-known "[Formula: see text] puzzle", and some tensions in [Formula: see text]. Beyond the standard model, we simultaneously determine weak-annihilation and new-physics parameters from data, employing model-independent scenarios that address the "[Formula: see text] puzzle", such as QED-penguins and [Formula: see text] current-current operators. We discuss also possibilities that allow further tests of our assumption once improved measurements from LHCb and Belle II become available.
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