Measurement of small angle antiproton-proton elastic scattering at sqrt s =546 and 1800 GeV.
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1994 The American Physical Society. Antiproton-proton elastic scattering was measured at c.m.s. energies s =546 and 1800 GeV in the range of four-momentum transfer squared 0.025<-t<0.29 GeV2. The data are well described by the exponential form ebt with a slope b=15.280.58 (16.980.25) GeV-2 at s =546 (1800) GeV. The elastic scattering cross sections are, respectively, el=12.870.30 and 19.700.85 mb.