B-factory signals for a warped extra dimension

Area of Science:

• High Energy Physics
• Particle Physics
• Cosmology

Background:

• Warped extra dimension models offer a new framework for particle physics beyond the Standard Model (SM).
• Custodial symmetry in these models allows for Kaluza-Klein masses around 3 TeV, consistent with electroweak data.
• The heavy top quark plays a crucial role in generating flavor violations, similar to the SM.

Purpose of the Study:

• To investigate the phenomenological predictions of a specific class of warped extra dimension models for B physics.
• To assess the impact of these models on precision measurements of flavor-changing transitions and CP violation.
• To examine potential discrepancies with Standard Model predictions and identify experimental signatures.

Main Methods:

• Theoretical calculations of B physics observables within the warped extra dimension framework.
• Comparison of model predictions with existing experimental data and Standard Model expectations.
• Analysis of contributions to Delta F=2 transitions, B -> X(s)l(+)l(-) decays, and radiative B decays.

Main Results:

• New physics contributions to Delta F=2 transitions are comparable to SM, implying the SM unitarity triangle fit's success is coincidental.
• Significant O(1) deviations are predicted for B(s) mixing and B -> X(s)l(+)l(-) decays.
• Large mixing-induced CP asymmetry in radiative B decays is expected, alongside a neutron electric dipole moment ~20 times the current bound.

Conclusions:

• The studied warped extra dimension models provide testable predictions for B physics, potentially altering precision measurements.
• These models exhibit a significant
• CP problem
• due to the large predicted neutron electric dipole moment.
• Experimental verification of these deviations would strongly support warped extra dimension scenarios.