ON ENERGY- AND MOMENTUM-TRANSFER DEPENDENCE IN PIP-]RHON

The effects on energy- and momentum-transfer dependence of cross-sections, caused by the variation of Δ(Formula presented.) with incident momentum and external masses, are investigated using a simple model for the differential cross-section. It is found that at intermediate momenta, ∼(3÷6) GeV/c the incident momentum dependence of the total cross-section for(Formula presented.) differs appreciably from that of the differential cross-section. The consequences for the Δ2 distributions of a zero near Δ2=0 are examined, and it is found that plotting in Δ2- Δ(Formula presented.) should be used to resolve this question. © 1968, Società Italiana di Fisica. All rights reserved.