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arxiv: hep-ph/9905306 · v1 · submitted 1999-05-11 · ✦ hep-ph · hep-lat· hep-th

θ Vacuum in a Random Matrix Model

classification ✦ hep-ph hep-lathep-th
keywords modelthetavacuummatrixaccuracyanalysisaspectscalculations
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Inspired by recent lattice calculations, we model certain aspects of the $\theta$-vacuum using a matrix model with gaussian weights. The vacuum energy exhibits a cusp at $\theta <\pi$ that is sensitive to both the accuracy of the numerical analysis and the maximum density of winding modes present in a finite volume.

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