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Lipatov L.N. (PNPI)
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Regge pole and Mandelstam cut contributions to production amplitudes in N=4 SUSY
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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