Proton-antiproton elastic scattering was measured at the center-of-mass energy s=546 GeV in the four-momentum transfer range 0.45⩽−⩽1.55GeV2. The shape of the t-distribution is quite different from that observed in proton-proton scattering at the ISR. Rather than a dip-bump structure, a kink is present at − ≈0.9GeV2 followed by a shoulder. The cross section at the second maximum is more than one order of magnitude higher than at the ISR

The proton-antiproton total cross section was measured at the CM energy √s = 546 GeV. The result is σtot = 61.9± 1.5 mb. The ratio of the elastic to the total cross section is σeℓ/σtot = 0.215±0.005. A comparison to the lower energy data shows that the increase of the total cross section with energy is very close to a log2s behaviour

Measurements of pp-+n + n m +X at Vs = 44 and 62 GeV are compared. The data are taken under identical conditions utilizing clean proton-proton collisions from the CERN intersecting storage rings and confirm scaling to 5%. The observed JU + JT yield is a factor of 1.6 ± 0.2 larger than estimated from a simple parton model but is consistent with QCD. The p T dependence of the muon pairs agrees well with expectations from QCD.

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Proton-antiproton elastic scattering was measured at the CM energy √s = 546 GeV in the four-momentum transfer range 0.03<−t<0.32GeV2 For −<0.15GeV2 the data are well described by a simple exponential form exp(bt) with slope parameter b=15.2±0.2GeV−2. This value is significantly larger than the one measured in the region 0.21<−t<0.50 GeV2