An Application of Operator Pade Approximants to Multireggeon Processes

Abstract

A series arising in a multireggeon description of scattering processes in Yang Mills theory, is considered. It is shown that after suitable transformation of integrands, it can be treated as a matrix element of a simple series of integral operators. This series resembles Neuman series and can be summed by [0/1] Pade Approximant. Direct solution of the integral equation leading to the series is however numerically difficult and unstable. The direct method is compared against the variational method of the calculation of matrix elements of OPA.