An asymmetric B factory based on PEP

The study of rare and CP-violating B meson decays is well suited to a high-luminosity e+e- collider. For studying certain decay processes there are also substantial benefits associated with asymmetric beam energies, which give a moving center of mass for the B mesons. We describe a design for a 9 GeV x 3JGeY B Factory in the PEP tunnel that would operate initially at a luminosity of 3 x 1033cm-2s-1. Technical problems include issues related to high currents (e.g., beam instabilities, feedback systems, lifetime degradation and detector radiation power dissipation) and those related to the heteroenergetic beams (e.g., beam separation, beam-beam interaction and detector requirements). Issues requiring R&D effort are identified. It is now generally accept.ed that the best facility to study rare CP-violating B meson decays is a high-luminosity electronpositron collider in which the particles have different energies.l Such a B Factory based on the PEP storage ring at SLAC has been under study for about two years, originally as a collaboration among LBL, SLAC, Caltech, and many university groups, and recently joined by LLNL. The names of the this study can be found in two internal reports, B articipants in l3 which cover the design activities in more detail than can be contained in this paper. 2. General