Higher point spin field correlators in image superstring theory Original Research Article

Calculational tools are provided allowing to determine general tree-level scattering amplitudes for processes involving bosons and fermions in heterotic and superstring theories in four space–time dimensions. We compute higher-point superstring correlators involving massless four-dimensional fermionic and spin fields. In image these correlators boil down to a product of two pure spin field correlators of left- and right-handed spin fields. This observation greatly simplifies the computation of such correlators. The latter are basic ingredients to compute multi-fermion superstring amplitudes in image. Their underlying fermionic structure and the fermionic couplings in the effective action are determined by these correlators.