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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Exploring Bd,s-->KK decays through flavor symmetries and QCD factorization
Sébastien Descotes-Genon1, Joaquim Matias, Javier Virto
1Laboratoire de Physique Théorique, CNRS/Université Paris-Sud 11 (UMR 8627), 91405 Orsay Cedex, France.
Physical Review Letters
|October 10, 2006
Summary
This study analyzes B meson decays to K meson pairs within the Standard Model, using flavor symmetry and factorization. A conflict between the Standard Model prediction and experimental data for Bs-->K+K- branching ratios is highlighted.
Area of Science:
- High Energy Physics
- Particle Physics
- Quantum Chromodynamics
Background:
- B meson decays provide crucial tests of the Standard Model (SM).
- Understanding Bd,s-->KK decay modes is essential for probing flavor physics.
- SU(3)-flavor symmetry and QCD-improved factorization are key theoretical tools.
Purpose of the Study:
- To perform a new analysis of Bd,s-->KK decay modes within the SM.
- To relate these modes using SU(3)-flavor symmetry and QCD-improved factorization.
- To propose sum rules for Bd,s-->K0K0 observables and predict U-spin breaking.
Main Methods:
- Application of SU(3)-flavor symmetry to relate different decay modes.
- Utilization of QCD-improved factorization for theoretical calculations.
- Derivation of sum rules for K0K0 final states.
- Comparison of theoretical predictions with experimental data.
Main Results:
- A controlled analysis of Bd,s-->KK modes is presented.
- Sum rules for Bd,s-->K0K0 observables are proposed.
- Branching ratios and CP asymmetries for Bs-->KK are determined as functions of Adir(Bd-->K0K0).
- A conflict between the SM prediction and data for BR(Bs-->K+K-) is identified.
- The amount of U-spin breaking between Bd-->pi+pi- and Bs-->K+K- is predicted.
Conclusions:
- The analysis reveals a tension between the Standard Model and experimental measurements for Bs-->K+K-.
- The proposed sum rules and U-spin breaking predictions offer new avenues for theoretical and experimental investigations.
- This work contributes to a deeper understanding of flavor physics and potential new physics beyond the Standard Model.
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