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Implications of the measurement of the Bs(0)Bs(0) mass difference
Zoltan Ligeti1, Michele Papucci, Gilad Perez
1Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.
Physical Review Letters
|October 10, 2006
Summary
New measurements of the beauty meson (Bs(0)Bs(0)) mass difference provide significant constraints on extensions to the standard model (SM). Future LHC data will further refine these constraints, particularly for next-to-minimal flavor violation models.
Area of Science:
- Particle Physics
- Beyond Standard Model Physics
Background:
- The Standard Model (SM) is the current framework for particle physics, but it does not explain all observed phenomena.
- Extensions to the SM, such as theories with new particles or forces, are actively researched.
- Measurements of B meson decays offer sensitive probes for new physics.
Purpose of the Study:
- To derive model-independent constraints on extensions of the Standard Model (SM) using recent Bs(0)Bs(0) mass difference measurements.
- To investigate the impact of future measurements of CP asymmetries in Bs decays at the Large Hadron Collider (LHC) on these extensions.
- To explore the interplay between different CP asymmetry measurements in constraining new physics models.
Main Methods:
- Analysis of model-independent constraints derived from the Bs(0)Bs(0) mass difference.
- Projection of constraints from future precise measurements of the time-dependent CP asymmetry in Bs --> psi phi (S(psiphi)) at the LHC.
- Consideration of the CP asymmetry in semileptonic Bs decays (ASL(s)) for constraining new physics frameworks.
Main Results:
- Significant new model-independent constraints on SM extensions are established from Bs(0)Bs(0) mass difference data.
- Future LHC data will provide precise measurements of S(psiphi), further constraining the parameter space of many SM extensions, especially next-to-minimal flavor violation models.
- ASL(s) measurements are crucial for constraining these frameworks and understanding the flavor sector in the LHC era.
Conclusions:
- A strong correlation between S(psiphi) and ASL(s) is identified across a broad class of new physics models.
- These CP asymmetry measurements offer complementary probes for new physics beyond the Standard Model.
- Precise measurements at the LHC will be vital for uncovering potential deviations from the SM and understanding flavor physics.
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