Studies of elementary particles

This report discusses the following tasks: Task B has completed and successfully operated 8 Michigan muon array patches for the UMC experiment. Data from the detector has already improved the limits on the ratio of gamma rays to hadrons in primary cosmic rays. The Task C built luminosity monitor for the Mark II detector is functioning well and fulfilling its key role in the determination of the Z mass and width. Major Task C contributions to the machine diagnostics, the beamstrahlung monitor and wire scanner, have provided critical tuning information for the SLC. Task E has recently reported the detection of 200 GeV γ-rays from the Crab Nebula with a statistical significance of 5.8 σ. This observation confirms the importance of imaging techniques for VHE γ-ray astronomy. The Michigan theory group (Task G) has focused on: Working to understand the systematics of gluon dynamics in poorly understood pseudoscalar meson decays; Exploring the consequences of heavy Higgs boson and/or a top quark more massive than the W+- or Z; Surveying the potentially attractive ways of experimentally searching for the Higgs boson of the minimal Standard Model or the spectrum of Higgs bosons to be expected in extensions of the Standard Model; Calculating the radiative corrections for W+W- → W+W- as a precision test of the Standard Model, especially in its sensitivity to the Higgs sector; Investigating the modifications of general relativity arising from quantum fluctuations of matter; Exploring phenomenological test of CP violation dynamics; Developing relations between the strong CP problem and ElectroWeak CP violation; and Investigating 4-Fermi interactions in Technicolor models