Enhanced Electroweak Penguin Amplitude in B{yields}VV Decays

Journal Article · Fri Apr 14 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.141801· OSTI ID:20777139

Beneke, M; Rohrer, J ^[1]; Yang, D ^[2]

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1. Institut fuer Theoretische Physik E, RWTH Aachen, D-52056 Aachen (Germany)
2. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)

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{sub B}/{lambda} relative to the standard penguin amplitudes. This leads to unique polarization signatures in penguin-dominated decay modes such as B{yields}{rho}K* similar to polarization effects in the radiative decay B{yields}K*{gamma} and offers new opportunities to probe the magnitude and chirality of flavor-changing neutral current couplings to photons.

• OSTI ID: 20777139
• Journal Information: Physical Review Letters, Vol. 96, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.96.141801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
B MESONS
CHIRALITY
COUPLING
CP INVARIANCE
FLAVOR MODEL
HADRONIC PARTICLE DECAY
HELICITY
K*-892 MESONS
NEUTRAL CURRENTS
PHOTONS
POLARIZATION
QUANTUM CHROMODYNAMICS
RADIATIVE DECAY
RHO-770 MESONS