期刊
PHYSICAL REVIEW LETTERS
卷 96, 期 14, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.96.141801
关键词
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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)/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 flavor-changing neutral current couplings to photons.
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