Loop integration results using numerical extrapolation for a non-scalar integral

Abstract

Loop integration results have been obtained using numerical integration and extrapolation. An extrapolation to the limit is performed with respect to a parameter in the integrand which tends to zero. Results are given for a non-scalar four-point diagram. Extensions to accommodate loop integration by existing integration packages are also discussed. These include: using previously generated partitions of the domain and roundoff error guards.

Comments: 4 pages, 3 figures, revised, contribution to ACAT03 (Dec. 2003)