Meson-Meson Scattering in Lattice QED_2+1
  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. 
H. R. Fiebig (Physics Department FIU University Park Miami, Florida   33199, USA) and R. M. Woloshyn (TRIUMF, 4004 Wesbrook ...