Dilute Instanton Gas of an O(3) Skyrme Model

Details Dilute Instanton Gas of an O(3) Skyrme Model Dilute Instanton Gas of an O(3) Skyrme Model

1998-08-27

arxiv.org/abs/hep-th/9808165v1

Phys.Lett. B438 (1998) 136-146

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, LaTeX

Scientific paper

10.1016/S0370-2693(98)00967-8

The pure-Skyrme limit of a scale-breaking Skyrmed O(3) sigma model in 1+1 dimensions is employed to study the effect of the Skyrme term on the semiclassical analysis of a field theory with instantons. The instantons of this model are self-dual and can be evaluated explicitly. They are also localised to an absolute scale, and their fluctuation action can be reduced to a scalar subsystem. This permits the explicit calculation of the fluctuation determinant and the shift in vacuum energy due to instantons. The model also illustrates the semiclassical quantisation of a Skyrmed field theory.

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