We investigate the use of the event topology as a tool in the search for the
six-jet decay of top-pair production in proton-antiproton collisions at 1.8
TeV. Modified Fox-Wolfram "shape" variables, H_i, are employed to help
distinguish the top-pair signal from the ordinary QCD multi-jet background. The
H's can be constructed directly from the calorimeter cells or from jets. Events
are required to lie in a region of H-space defined by L_i < H_i < R_i for
i=1,...,,6, where the left, L_i, and right, R_i, cuts are determined by a
genetic algorithm (GA) procedure to maximize the signal over the square root of
the background. We are able to reduce the background over the signal to less
than a factor of 100 using purely topological methods without using jet
multiplicity cuts and without the aid of b-quark tagging.Comment: LaTeX, 19 pages, 13 figure
