Enhanced electroweak penguin amplitude in B-->VV decays

Area of Science:

• High Energy Physics
• Particle Physics
• Quantum Chromodynamics

Background:

• B meson decays are crucial for testing the Standard Model of particle physics.
• Penguin amplitudes play a significant role in flavor-changing neutral current processes.
• Understanding transverse helicity amplitudes is key to analyzing vector meson decays.

Purpose of the Study:

• To investigate a novel electromagnetic penguin contribution to transverse helicity amplitudes in B decays to two vector mesons.
• To explore the implications of this contribution for polarization signatures in specific decay modes.
• To offer new avenues for probing flavor-changing neutral current couplings to photons.

Main Methods:

• Theoretical analysis of B meson decays involving vector mesons.
• Calculation of electromagnetic penguin contributions to transverse helicity amplitudes.
• Comparison of predicted polarization effects with existing data and theoretical frameworks.

Main Results:

• A novel electromagnetic penguin contribution is identified, enhanced by (mB/Lambda)^2 relative to standard penguins.
• This contribution leads to unique polarization signatures in decays like B-->rhoK*.
• The findings suggest similarities to polarization effects observed in B-->K*gamma decays.

Conclusions:

• The novel electromagnetic penguin contribution provides distinct polarization observables.
• These observables offer new opportunities to probe the magnitude and chirality of flavor-changing neutral current couplings.
• The study enhances the understanding of B meson physics and searches for New Physics beyond the Standard Model.