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Using four-dimensional unitarity and MHV-rules we calculate the one-loop MHVamplitudes with all external particles in the adjoint representation for N=2supersymmetric QCD with N_f fundamental flavours. We start by considering suchamplitudes in the superconformal N=4 gauge theory where the N=4 supersymmetricWard identities (SWI) guarantee that all MHV amplitudes for all types ofexternal particles are given by the corresponding tree-level result times auniversal helicity- and particle-type-independent contribution. In N=2 SQCD theMHV amplitudes differ from those for N=4 for general values of N_f and N_c.However, for N_f=2N_c where the N=2 SQCD is conformal, the N=2 MHV amplitudes(with all external particles in the adjoint representation) are identical tothe N=4results. This factorisation at one-loop motivates us to pose a questionif there may be a BDS-like factorisation for these amplitudes which also holdsat higher orders of perturbation theory in superconformal N=2 theory.

MHV amplitudes in N=2 SQCD and in N=4 SYM at one loop