B physics at the Z0 pole

The SLC has been running at SLAC since April 1989, and more than 100 Z0 events have been reconstructed. Soon the new European facility at CERN-LEP will also turn on, and by the end of the year we anticipate that more than 10,000 Z0 events will have been registered by each of the four LEP detectors. Most of the experimental facilities at these two machines are equipped with excellent particle tracking and identification. Some have close-in tracking devices that will provide unparalleled precision in trajectory reconstruction, and lead to the possibility of identifying a large proportion of the charmed and beauty particles. Not only does the Z0 pole offer a relatively large production cross section fro e+e- machines, but a large proportion of the events (approximately 22 percent of the hadronic events) are b bar b pairs. The relative cross section for e+e- → z0 → b bar b is shown in comparison to the Y4s and Y5s. One sees from this figure that a gain of six or more is obtained from running at the Z0. An SLC producing 105 events per year yields 20,000 b bar b events. Similarly, for LEP (running an order of magnitude higher in luminosity), over 200,000 b bar b events will become available per year. In addition, the planned upgrade for LEP will increase its luminosity by about an order of magnitude, and the SLC will run with polarized electron beams. In this paper the physics is studied from these event samples fall into two general categories: tests of the Standard Model; and studies of B-mesons and B-baryons, including lifetimes, mixing, spectroscopy, and CP violation