Low momentum transfer elastic scattering at the CERN proton-antiproton collider

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.