Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-06-14
JHEP 0208 (2002) 038
Physics
High Energy Physics
High Energy Physics - Theory
20 pages, no figures. Sec. 3 clarified; typos corrected
Scientific paper
10.1088/1126-6708/2002/08/038
We fully compute the N=1 supersymmetrization of the fourth power of the Weyl tensor in d=4 x-space with the auxiliary fields. In a previous paper, we showed that their elimination requires an infinite number of terms; we explicitely compute those terms to order \kappa^4 (three loop). We also write, in superspace notation, all the possible N=1 actions, in four dimensions, that contain pure R^4 terms (with coupling constants). We explicitely write these actions in terms of the \theta components of the chiral density \epsilon and the supergravity superfields R, G_m, W_{ABC}. Using the method of gauge completion, we compute the necessary \theta components which allow us to write these actions in x-space. We discuss under which circumstances can these extra R^4 correction terms be reabsorbed in the pure supergravity action, and their relevance to the quantum supergravity/string theory effective actions.
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