Measurement of the p p total cross section at radical s =1. 8 TeV

We have measured the antiproton-proton total cross section at {radical}{ital s} =1.8 TeV at the Fermilab Tevatron Collider; the value obtained is 78.3{plus minus}5.9 mb. {ital B}, the nuclear slope parameter for elastic scattering, was measured to be 16.3{plus minus}0.5 (GeV/{ital c}){sup {minus}2}. From these data, we derive a value for the total elastic cross section.