Two-body spectra of pseudoscalar mesons with an $O(a^2)$--improved lattice action using Wilson fermions

Details Two-body spectra of pseudoscalar mesons with an $O(a^2)$--improved lattice action using Wilson fermions Two-body spectra of pseudoscalar mesons with an $O(a^2)$--improved lattice action using Wilson fermions

1997-09-30

arxiv.org/abs/hep-lat/9709152v1

Nucl.Phys.Proc.Suppl. 63 (1998) 188-190

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 4 EPS figures, Poster presented at "Lattice'97", to appear in the proceedings

Scientific paper

10.1016/S0920-5632(97)00717-2

We extend our calculations with the second-order tree-level and tadpole improved next-nearest-neighbor action to meson-meson systems. Correlation matrices built from interpolating fields representing two pseudoscalar mesons (pion-pion) with relative momenta p are diagonalized, and the mass spectrum is extracted. Link variable fuzzing and operator smearing at both sinks and sources is employed. Calculations are presented for two values of the hopping parameter. The spectrum is used to discuss the residual interaction in the meson-meson system.

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