^ CLEO Experiment at CESR J. J. Thaler,* B. I. Eisenstein, G. E. Gladding, G. D. Gollin, I. Karliner, M. A. Selen, J. A. Ernst, M. J. Haney, M. A. Palmer, T. J. Bergfeld, C. Sedlack, N. Lowery, M. Marsh, C. Plager, J. Williams U.S. Department of Energy, DEFG02-91ER40677
The CLEO experiment at the Cornell electron positron storage ring (CESR) studies the properties of the bottom and charmed quarks and the tau lepton. The primary goals of these studies are threefold: understanding of the origin of the Cabibbo-Kobayashi-Maskawa (CKM) mixing matrix, for which no dynamical theory exists; understanding of time reversal symmetry violation, which appears to be a necessary prerequisite to the observed matter-antimatter asymmetry of the universe; and tests of the "standard model" of particle physics, whose very precise predictions have been tested very accurately, but which, nonetheless, is known not to be correct. Deviations from these predictions will indicate where the flaw lies.
^ High-Energy Photoproduction J. Wiss,* D. Kim, C. Cawlfield University of Illinois
(In collaboration with other institutions)
Researchers study charmed particles produced by high-energy photons. The team completed data taking at Fermilab in the summer of 1997, after amassing a huge charm sample. Researchers use this unparalleled sample of charm particles to study rare charm decays, charm lifetimes, excited charm spectroscopy, and QCD based models for charm photoproduction and decay. The Illinois group made major contributions to the FOCUS hardware and software, and they recently played a critical role in the observation of charm mixing at the 2.4 standard deviation level.
