Does pi -N scattering show the dip structure in the differential cross section at the FNAL energy region?

The differential cross section of p-p elastic scattering in the CERN- ISR energy region has a marked diffraction-like dip at -t approximately 1.4 (GeV/c)/sup 2/. pi -N scattering has the dip-bump structure at low energies, but this feature fades as the energy goes higher, consistently with its non-Pomeron Regge-pole interpretation. At higher energies the Pomeron will dominate the scattering at small momentum transfer and the observed dip in p-p scattering is expected to be closely related with the nature of the Pomeron. Therefore, the authors examine whether or not pi -N scattering shows the dip at small momentum transfer, say, -t<5 (GeV/c)/sup 2/ in the FNAL region. (9 refs).