Simplifying the large mass expansion

TL;DR

This paper presents a method to simplify the large mass expansion, enabling the derivation of more terms analytically, demonstrated through two-loop four-point Feynman integrals relevant to Higgs decay into three gluons.

Contribution

It introduces a simplified approach to the large mass expansion that allows for more terms to be obtained analytically, improving computational efficiency.

Findings

More terms of the large mass expansion can be derived analytically.

The method is demonstrated on two-loop four-point Feynman integrals for Higgs decay.

The approach enhances the analytical tractability of complex Feynman integrals.

Abstract

It is shown how the well-known large mass expansion can be simplified to obtain more terms of the expansion in an analytic form. Expanding two-loop four-point Feynman integrals which contribute to the process $H \to ggg$ is used as an example.