Asymptotic behaviour of the nucleon-nucleon scattering amplitudes according to the multiperipheral model

Abstract

The asymptotic behaviour of the nucleon-nucleon elastic scattering amplitudes at high-energy and small momentum transfer is derived in the framework of the multiperipheral model. The results agree with those obtained according to the « reggeizing» rules, except for the axial vector amplitude which differs in some peculiar features of physical interest. In particular, it. requires the introduction of a new term, which is independent from the two coefficients exhibited by the π-N and by the otherN-N amplitudes. The new term does not appear in the asymptotic expressions of the cross-sections and polarization, but one can find other physical observables,e.g. the depolarization, in which it is present.