Eur. Phys. J. C (1998) 5: 175-179
https://doi.org/10.1007/s100529800815

Theoretical physics

Two-loop self-energy diagrams worked out with NDIM

Institute de Física Teórica, Universidade Estadual Paulista, R. Pamplona 145, CEP 01405-900, São Paulo SP, Brazil

Received: 19 September 1997
Revised: 20 November 1997
Published online: 16 September 2013

Abstract

In this work we calculate two two-loop massless Feynman integrals pertaining to self-energy diagrams using NDIM (Negative Dimensional Integration Method). We show that the answer we get is 36-fold degenerate. We then consider special cases of exponents for propagators and the outcoming results compared with known ones obtained via traditional methods.