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Solution to the flavor problem of warped extra-dimension models
Martin Bauer1, Raoul Malm, Matthias Neubert
1Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany.
Physical Review Letters
|April 3, 2012
Summary
This study proposes a minimal solution to the flavor problem in warped extra-dimension models. The new model relaxes constraints from CP violation, allowing for Kaluza-Klein scales around 2 TeV without fine-tuning.
Area of Science:
- High Energy Physics
- Theoretical Physics
- Particle Physics
Background:
- Warped extra-dimension models face a flavor problem due to excessive CP violation from Kaluza-Klein gluon exchange.
- The ε(K) parameter imposes stringent constraints on Kaluza-Klein scales in these models.
Purpose of the Study:
- To propose a minimal solution to the flavor problem in warped extra-dimension models.
- To relax constraints on Kaluza-Klein scales imposed by CP violation observables.
Main Methods:
- Extending the bulk strong-interaction gauge group by an additional SU(3).
- Breaking the extended SU(3) symmetry to Quantum Chromodynamics (QCD) using boundary conditions.
Main Results:
- Significantly relaxed constraints from the ε(K) parameter.
- Kaluza-Klein (KK) scales around 2 TeV are consistent with flavor observables without fine-tuning.
- The model predicts an extended Higgs sector with massive color-octet scalars and KK pseudoaxial gluon resonances.
Conclusions:
- The proposed minimal solution effectively addresses the flavor problem in warped extra-dimension models.
- The model's predictions, including new scalar particles and gluon resonances, are consistent with current LHC data.
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