Gauge theory renormalizations from the open bosonic string

Abstract

We present a unified point of view on the different methods available in the literature to extract gauge theory renormalization constants from the low-energy limit of string theory. The Bern-Kosower method, based on an off-shell continuation of string theory amplitudes, and the construction of low-energy string theory effective actions for gauge particles, can both be understood in terms of strings interacting with background gauge fields, and thus reproduce, in the low-energy limit, the field theory results of the background field method. We present in particular a consistent off-shell continuation of the one-loop gluon amplitudes in the open bosonic string that reproduces exactly the results of the background field method in the Feynman gauge.

14 pages, latex, no figures

References in corpus (3)

• One-Loop Corrections to Five-Gluon Amplitudes
• String-Based Methods in Perturbative Gravity
• Exact Supersymmetric String Solutions in Curved Gravitational Backgrounds

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