Working closely with Frank Porter for many years, I have probed the flavor sector of the Standard Model by making increasingly precise measurements of the production and decay properties of heavy quarks and leptons. These experiments, carried out over the last several decades with the Mark II (at SPEAR), Mark III, Crystal Ball, BES-II, SLD and BABAR detectors, have been crucial in establishing the validity of the Standard Model flavor sector ansatz. In particular, our measurement of the CP asymmetry in B0 decays at BABAR was cited in the award of the 2008 Nobel Prize to Kobayashi and Maskawa.

Our current program comprises two novel and extremely sensitive probes of physics beyond the Standard Model: the Mu2e experiment at Fermilab, a search for evidence of charged lepton flavor violation in muon-to-electron conversion and the nascent LDMX experiment at SLAC, a very sensitive search for hidden sector dark matter particles. We also continue analysis of BABAR data, as much of the sample remains unique.