The beta-function of the Wess-Zumino model at O(1/N^2)

Details The beta-function of the Wess-Zumino model at O(1/N^2) The beta-function of the Wess-Zumino model at O(1/N^2)

1997-12-15

arxiv.org/abs/hep-th/9712138v1

Nucl.Phys. B525 (1998) 435-456

Physics

High Energy Physics

High Energy Physics - Theory

19 latex pages, 5 postscript figures

Scientific paper

10.1016/S0550-3213(98)00236-3

We extend the critical point self-consistency method used to solve field theories at their d-dimensional fixed point in the large N expansion to include superfields. As an application we compute the beta-function of the Wess-Zumino model with an O(N) symmetry to O(1/N^2). This result is then used to study the effect the higher order corrections have on the radius of convergence of the 4-dimensional beta-function at this order in 1/N. The critical exponent relating to the wave function renormalization of the basic field is also computed to O(1/N^2) and is shown to be the same as that for the corresponding field in the supersymmetric O(N) sigma model in d-dimensions. We discuss how the non-renormalization theorem prevents the full critical point equivalence between both models.

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