# Algebraic reduction of one-loop Feynman diagrams to scalar integrals. II

## Description

Abstract An extended scheme for the reduction of one-loop form factors occuring in a general gauged quantum field theory to scalar integrals is discussed and an alternative method that may be applied in the case when the scheme fails is indicated. The extensions are implemented in a new version of the package LERG-I, written in REDUCE. Title of program: LERG-I Catalogue Id: ABBX_v2_0 [ABLU] Nature of problem Expressions obtained in the calculation of one-loop radiative processes in high energy physics are generally simplified by expressing them in terms of scalar integrals. LERG-I makes the reduction from form factors assocated with the various possible Lorentz tensors occuring in the problem. Versions of this program held in the CPC repository in Mendeley Data ABBX_v1_0; LERG-I; 10.1016/0010-4655(88)90202-0 ABBX_v2_0; LERG-I; 10.1016/0010-4655(90)90019-W ABBX_v3_0; LERG-I; 10.1016/0010-4655(94)00141-N This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)