Implications of decoupling effects for one-loop corrected effective actions from superstring theory

Details Implications of decoupling effects for one-loop corrected effective actions from superstring theory Implications of decoupling effects for one-loop corrected effective actions from superstring theory

1999-03-29

arxiv.org/abs/hep-th/9903243v1

Mod.Phys.Lett.A15:783-790,2000

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, Latex

Scientific paper

10.1016/S0217-7323(00)00076-1

We study the decoupling effects in one-loop corrected N=1 supersymmetric theory with gauge neutral chiral superfields, by calculating the one-loop corrected effective Lagrangian that involves light and heavy fields with the mass scale M, and subsequently eliminating heavy fields by their equations of motion. In addition to new non-renormalizable couplings, we determine the terms that grow as log(M) and renormalize the fields and couplings in the effective field theory, in accordance with the decoupling theorem. However, in a theory derived from superstring theory, these terms can significantly modify low energy predictions for the effective couplings of light fields. For example, in a class of heterotic superstring vacua with an anomalous U(1) the vacuum restabilization introduces such decoupling effects which in turn correct the low energy predictions for certain couplings by 10-50%.

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