Wuppertal 2015 – scientific programme
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T: Fachverband Teilchenphysik
T 33: Flavourphysik 1 (Theorie)
T 33.2: Talk
Monday, March 9, 2015, 17:00–17:15, K.12.20 (K2)
B→ K(*)νν decays in the Standard Model and beyond — Andrzej Buras1, Jennifer Girrbach-Noe1, •Christoph Niehoff2, and David Straub2 — 1TUM Institute for Advanced Study, Lichtenbergstr. 2a, 85748 Garching — 2Excellence Cluster Universe, TUM, Boltzmannstr. 2, 85748 Garching
We present an analysis of the rare exclusive B decays B→ Kνν and B→ K*νν within the Standard Model (SM), in a model-independent manner, and in a number of new physics (NP) models. Using recent form factor determinations we obtain SM predictions that are more precise and more robust than previous estimates. Beyond the SM, we make use of an effective theory with dimension-six operators invariant under the SM gauge symmetries to relate NP effects in b→ sνν transitions to b→ sℓ+ℓ− transitions and use the wealth of experimental data on B→ K(*)ℓ+ℓ− and related modes to constrain NP effects in B→ K(*)νν. We then consider several specific NP models, including Z′ models, the MSSM, models with partial compositeness, and leptoquark models, demonstrating that the correlations between b→ sνν observables among themselves and with Bs→µ+µ− and b→ sℓ+ℓ− transitions offer powerful tests of NP with new right-handed couplings and non-MFV interactions.