Meson meson scattering phase shifts in (2+1)-dimensional lattice QED

Fiebig, H.R.; Dominguez, A.; Woloshyn, R.M.

doi:10.1016/0550-3213(94)90534-7

Meson meson scattering phase shifts in (2+1)-dimensional lattice QED

1994

37 pages

Published in:

Nucl.Phys.B 418 (1994) 649-685

DOI:

10.1016/0550-3213(94)90534-7

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Abstract: (Elsevier)

The mass spectrum of a meson-meson system in compact three-dimensional lattice quantum electrodynamics is computed from a time correlation matrix with staggered fermions. The energy levels indicate a slightly attractive residual interaction between the mesons. From the finite-volume spectrum scattering phase shifts within the various irreducible representations of the (cubic, d = 2) lattice symmetry group are extracted. The s-wave (ℓ = 0) phase shifts are consistent with repulsion at small relative distance. The d-wave (ℓ = 2) data indicate intermediate-range attraction.

quantum electrodynamics: compact
lattice field theory
dimension: 3
meson meson: interaction
interaction: meson meson
mass spectrum
partial wave
correlation function
group theory: representation
group theory: O(2,Z)

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