Title: Closing the Triangle: How Recent Progress in CP Violation is Putting the Squeeze on New Physics Abstract:

Abstract: The Kobayashi-Maskawa (KM) 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, 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 new measurements of the UT angles alpha and gamma that are beginning to provide non-trivial constraints on possible scenarios of physics beyond the Standard Model.