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Cancellation of infrared divergences to all orders in light front QED
Phys. Rev. D 89, 105021 – Published 22 May, 2014
DOI: https://doi.org/10.1103/PhysRevD.89.105021
Abstract
We present an all-order proof of the cancellation of infrared (IR) divergences in light-front quantum electrodynamics using a coherent state approach. It is shown, using fermion mass renormalization as an example, that the true IR divergences are eliminated to all orders in a light-front time-ordered perturbative calculation if one uses a coherent state basis instead of the usual Fock basis to calculate the Hamiltonian matrix elements.
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