Generalized vector dominance and the low q/sup 2/. mu. p and. mu. d inelastic scattering at 150 GeV. [Cross sections, structure functions]

The generalized vector dominance model of Greco is used to relate recent electron and muon deep inelastic scattering measurements with the photoproduction cross section. An accurate fit of the SLAC 4/sup 0/ ep and ed scattering data for ..omega.. > 9 is obtained giving photoproduction cross sections in good accord with the directly measured values. The same fit applied to our recent ..mu..p and ..mu..d inelastic scattering measurements for q/sup 2/ < 1, gives estimates of sigma/sub ..gamma..d/ and sigma/sub ..gamma..p/ up to 130 GeV. Muon-inclusive cross sections are discussed only.