Enhanced electroweak penguin amplitude in B-->VV decays
High Energy Physics - Phenomenology
2008-11-26 v1
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 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.
Keywords
Cite
@article{arxiv.hep-ph/0512258,
title = {Enhanced electroweak penguin amplitude in B-->VV decays},
author = {M. Beneke and J. Rohrer and D. Yang},
journal= {arXiv preprint arXiv:hep-ph/0512258},
year = {2008}
}
Comments
4 pages, 1 figure