Enhanced electroweak penguin amplitude in B-->VV decays

Details Enhanced electroweak penguin amplitude in B-->VV decays Enhanced electroweak penguin amplitude in B-->VV decays

2005-12-20

arxiv.org/abs/hep-ph/0512258v1

Phys.Rev.Lett.96:141801,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.96.141801

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 mB/Lambda relative to the standard penguin amplitudes. This leads to unique polarization signatures in penguin-dominated decay modes such as B-->rho K* similar to polarization effects in the radiative decay B-->K*gamma, and offers new opportunities to probe the magnitude and chirality of flavour-changing neutral current couplings to photons.

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