Enhanced Electroweak Penguin Amplitude inB→VVDecays

2005/12/20 by Μ. Beneke, M. Beneke, J. Rohrer +2 · 1 citation
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevlett.96.141801

published as Phys.Rev.Lett.96:141801,2006 · 4 pages, 1 figure

arxiv created 2005/12/20 · openalex publication_date 2006/04/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We discuss a novel electromagnetic penguin contribution to the transverse helicity amplitudes in B decays to two vector mesons, which is enhanced by two powers of m_B/\ensuremathΛ relative to the standard penguin amplitudes. This leads to unique polarization signatures in penguin-dominated decay modes such as B\ensuremath→\ensuremathρK^* similar to polarization effects in the radiative decay B\ensuremath→K^*\ensuremathγ and offers new opportunities to probe the magnitude and chirality of flavor-changing neutral current couplings to photons.

Citations

• Measurement of theB0→ϕK*0Decay Amplitudes
• An effective field theory for collinear and soft gluons: Heavy to light decays
• QCD factorization in B→πK, ππ decays and extraction of Wolfenstein parameters
• QCD Factorization forB→ππDecays: Strong Phases andCPViolation in the Heavy Quark Limit
• Measurement of Branching Fractions and Polarization inB→φK(*)Decays
• Rates, Polarizations, and Asymmetries in Charmless Vector-VectorBMeson Decays
• QCD factorization for exclusive non-leptonic B-meson decays: general arguments and the case of heavy–light final states

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