The lattice Schwinger model with the SW action

Details The lattice Schwinger model with the SW action The lattice Schwinger model with the SW action

1998-07-06

arxiv.org/abs/hep-lat/9807011v1

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages (LaTeX), 5 figures (EPS)

Scientific paper

We perform a model study on the 2-flavor lattice Schwinger model using standard Wilson and ${\cal O}(a)$ improved Sheikholeslami-Wohlert (SW) action. We find, that the phase diagram is altered, the critical line shifted closer towards its continuum value $\kappa_c=0.25$. We find no improvement in the rotation invariance of meson propagators; the scaling of the Schwinger mass is considerably improved, high momentum states are not. The additional cost of $\approx 30 %$ CPU-time is highly justified when calculating masses, but not for high momentum observables.

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