COBEX, A DEDICATED COLLIDER B-EXPERIMENT

COBEX (COllider Beauty EXperiment) is a dedicated open-geometry forwar d spectrometer experiment for a hadron collider (LHC, SSC, Tevatron or UNK), which is capable of providing large samples of many different r econstructed exclusive B-meson decays with good measurements of proper time, mass and initial flavor. We discuss the issues that lead to des ign decisions optimizing the ''CP-reach'' of the experiment and evalua te its expected performance using Monte Carlo techniques. Matching the fixed-target geometry of the forward detector requires a microvertex detector with RF-shielded silicon-strip planes, installed inside the m achine vacuum pipe perpendicular to the beam line. A large microvertex detector of this type has been built and successfully tested at the S PS-Collider. The experiment can be run with a high-p(t) muon trigger f or luminosities more than 10(32) CM-2 S-1, or with a more efficient Le vel-1 topology trigger (based on silicon information) with luminositie s up to a few times 10(31).