Two-Loop Calculations in phi^4 Light-Front Field Theory

TL;DR

This paper performs a two-loop calculation in light-front phi^4 theory to determine the effective mass renormalization, demonstrating a boost-invariant scheme that aligns with covariant Feynman diagram results.

Contribution

It introduces a boost-invariant renormalization scheme for two-loop calculations in light-front phi^4 theory, matching covariant results.

Findings

Effective mass renormalization matches covariant calculations

Boost invariance is preserved in the renormalization scheme

Two-loop calculations are successfully performed in light-front framework

Abstract

We perform a two-loop calculation in light-front phi^4 theory to determine the effective mass renormalization of the light-front Hamiltonian. The renormalization scheme adopted here is manifestly boost invariant, and yields results that are in perfect agreement with the explicitly covariant Feynman diagram approach.