Infrared and extended on-mass-shell renormalization of two-loop diagrams

Abstract

Using a toy model Lagrangian we demonstrate the application of both infrared and extended on-mass-shell renormalization schemes to multiloop diagrams by considering as an example a two-loop self-energy diagram. We show that in both cases the renormalized diagrams satisfy a straightforward power counting.

Comments: 10 pages, 2 figures, REVTeX 4