Bulletin of the American Physical Society
2006 APS April Meeting
Saturday–Tuesday, April 22–25, 2006; Dallas, TX
Session H1: Recent Results in Flavor Physics |
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Sponsoring Units: DPF Chair: Jack Ritchie, University of Texas, Austin Room: Hyatt Regency Dallas Landmark A |
Sunday, April 23, 2006 8:30AM - 9:06AM |
H1.00001: CP violation and the Unitarity Triangle Invited Speaker: In the Standard Model of particle physics, the Kobayashi-Maskawa mechanism explains CP violation as arising from a single phase in the weak-interaction Lagrangian describing transitions between different quark flavors. This phase information is conveniently parameterized in the complex plane through the Unitarity Triangle (UT), whose interior angles are CP-violating observables that are directly measurable in decays of the $B$ meson. Although this picture has been dramatically confirmed by the $B$-Factory experiments through precision measurements of the UT angle $\beta\,(\phi_1)$, several theories of physics beyond the Standard Model predict additional CP-violating phases that could show observable effects in B decays. In this talk I will summarize recent progress in the understanding of CP violation, including recent measurements of the UT angles $\alpha\,(\phi_2)$ and $\gamma\,(\phi_3)$ that are beginning to provide non-trivial constraints on possible scenarios of physics beyond the Standard Model. [Preview Abstract] |
Sunday, April 23, 2006 9:06AM - 9:42AM |
H1.00002: Rare Decays Invited Speaker: In this talk we highlight recent results on measurements of, and searches for, rare and exotic decays of heavy hadrons. New world records in peak luminosity are constantly being set at the B-factories and the Tevatron where BaBar, Belle, CDF, and D\O\ have all accumulated unprecedented data samples. We discuss precision measurements that are now being performed using $B$ decay channels with branching fractions on the order of $10^{-6}$ and searches for new modes that probe $D$ meson decay near the $10^{-6}$ level and $B$ meson decay near the $10^{-7}$ level. These studies are strongly motivated by new physics scenarios that predict large deviations from Standard Model expectations. Emphasis will also be placed on the complementary nature of flavor physics programs at low energy $e^+e^-$ and high energy hadron colliders. [Preview Abstract] |
Sunday, April 23, 2006 9:42AM - 10:18AM |
H1.00003: Semileptonic B Decays Invited Speaker: Semileptonic $B$ decays provide the best experimental probes for the Cabibbo-Kobayashi-Maskawa matrix elements $V_{ub}$ and $V_{cb}$. A precise determination of the ratio $|V_{ub}/V_{cb}|$ would significantly improve the constraints on the Unitarity Triangle and provide a stringent test of the Standard-Model mechanism for $CP$ violation. In this talk, I will review recent experimental measurements of the inclusive and exclusive semileptonic $B$ decays, and discuss their interpretations. [Preview Abstract] |
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