High momentum resolution p(antip) total cross section in the 'T' region

We report here on a high mass resolution measurement of the pp total cross section in the 'T-meson' region at Psub(lab) = 1.3 GeV/c. The experiment utilized a partially separated beam at the Brookhaven AGS. It was performed in an optical spark chamber array originally designed to measure angular distributions of pure neutral mesonic final states of anti(p)p annihilations. At the end of this experiment we performed an experiment to search for resonances of definite G-parity in the T region by a measurement of the true pion multiplicity (charged and neutral) of anti(p)p annihilations. The trigger for this experiment was a small counter downstream of the target which vetoed the unscattered beam. The electronic rates monitored during data taking - closely related to the total cross section - showed strong suggestions of substructure in the T-meson region. We repeated the electronics portion of the experiment with higher statistics, extracted the total cross section, and present the results here. (author)