Wess-Zumino term by Vacuum Overlap Formula

Abstract

We examine the vacuum overlap formula for the two-dimensional SU(2) Wess-Zumino term in lattice regularization. Perturbatively it reproduces the Wess-Zumino term correctly in the continuum limit and yields the IR fixed point in the beta function of the chiral model. Nonperturbatively it shows a sharp Gaussian distribution for the SU(2) chiral field configurations in the scaling region, where smooth configurations dominate even in the symmetric phase due to asymptotic freedom. Crossover is sharp from the strong coupling region where the Wess-Zumino term fluctuates hard and the species doublers' contribution is suspected to affect it.

arXiv comment21 LaTeX pages with 9 postscript figures, ptptex.sty included

Cited by in corpus (8)

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• Chiral zero modes on the domain-wall model in 4+1 dimensions
• Manifestly Gauge Covariant Treatment of Lattice Chiral Fermions. II
• The domain-wall model in an asymptotic-free dynamics
• Gauge Freedom in Chiral Gauge Theory with Vacuum Overlap