2-LOOP RELEVANT PARTS OF D-DIMENSIONAL MASSIVE SCALAR ONE-LOOP INTEGRALS

The calculation of two-loop Feynman integrals within the dimensional regularization scheme requires the knowledge of scalar one-loop integrals up to the linear term in D-4. We give the corresponding explicit expressions in terms of polylogarithms for the general one-, two- and three-point function and for a special case of the four-point function needed for vertex corrections. Our results are valid in all kinematical regions for real masses and momenta.