L.N.Lipatov (PNPI)


Regge pole and Mandelstam cut contributions to production amplitudes in N=4 SUSY


We investigate analytic properties of production amplitudes in the multi-Regge kinematics of N=4 SUSY. It turns out, that the well-known approach of Weis for construction of the Regge pole contributions to the production amplitudes leads to expressions having non-physical singularities in the physical regions. The Mandelstam cut contributions improve the analytic properties of these amplitudes