Scattering phase shifts of a meson-meson system in staggered 3-dimensional lattice QED are computed. The main task of the simulation is to obtain a discrete set of two-body energy levels. These are extracted from a 4-point time correlation matrix and then used to obtain scattering phase shifts. The results for the l=0 and l=2 partial waves are consistent with short- range repulsion and intermediate-range attraction of the residual meson- meson interaction.
@article{arxiv.hep-lat/9210036,
title = {Meson-Meson Scattering in Lattice QED_2+1},
author = {H. R. Fiebig and R. M. Woloshyn},
journal= {arXiv preprint arXiv:hep-lat/9210036},
year = {2009}
}