Form factor in deuteron inelastic screening att≠0

We show that the extension of Gribov inelastic-screening amplitude att≠0, if we use the prescriptions of coherents production for the low-mass part and the triple-Regge formalism for the high-mass part, leads to a sharp discontinuity in the corresponding six-point amplitude and, therefore, a violation of the finite-mass sum rule. This is resolved if we apply the same damping factor of the triple-Regge formalism (essentially the pomeron-hadron residuum) to the low-mass part. This recipe leads to agreement between experiment and theory for the recent ISR data for pd elastic scattering. In the quark-parton model for hadronic diffraction this factor is applied to the whole spectrum of inelastic intermediate diffractive states and is naturally interpreted as Fourier transform of the transverse spatial distribution of the partons in the incident hadron. The presence of this factor is instrumental in eliminating the ambiguity in the duality property of six-point amplitudes, and definitely excludes the abnormal version suggested in the literature.