38 citations · 89 across the 15 of their papers we have counts for
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hep-th2019
An -Matrix for Massless Particles
Holmfridur Hannesdottir, Matthew D. Schwartz
The traditional -matrix does not exist for theories with massless particles, such as quantum electrodynamics. The difficulty in isolating asymptotic states manifests itself as i…
hep-th2019
A Finite -Matrix
Holmfridur Hannesdottir, Matthew D. Schwartz
When massless particles are involved, the traditional scattering matrix (-matrix) does not exist: it has no rigorous non-perturbative definition and has infrared divergences in…