Improved methods for supergraphs |
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Authors: | MT Grisaru W Siegel M Roček |
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Institution: | Department of Physics, Brandeis University, Waltham, Massachusetts 02154, USA;DAMTP, University of Cambridge, Silver Street, Cambridge CB3 9EW, England, UK |
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Abstract: | We introduce some new techniques into superfield perturbation theory which allow considerable simplifications in calculations. As a result, we show that all contributions to the effective action can be written as integrals over a single d4θ. We also give the background group field formalism for supersymmetric non-abelian gauge theories. To illustrate our methods, we give examples of loop calculations: in particular, we show that in O(4) extended supersymmetric non-abelian gauge theories all one-loop propagator corrections cancel identically (both infinite and finite parts) and that these theories, at one loop, are finite and have no renormalizations (in the Fermi-Feynman gauge). |
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