Superfield formulation of the N=2 super-Yang-Mills model with central charge

The N = 2 super-Yang-Mills model with central charge is constructed in terms of the N = 1 superfields. The supersymmetric constraints generalizing the linear multiplet in the non-abelian case are found. This formulation is shown to be equivalent, using the supersymmetric Lagrange multipliers, to the previously known formulation of Fayet. (orig.)