One-Loop $\beta$ Function of the Double Sigma Model with Constant Background

Abstract

The double sigma model with the strong constraints is equivalent to a classical theory of the normal sigma model with one on-shell self-duality relation. The one-form gauge field comes from the boundary term. It is the same as the normal sigma model. The gauge symmetries under the strong constraints are the diffeomorphism and one-form gauge transformation in the double sigma model. These gauge symmetries are also the same as the Dirac-Born-Infeld (DBI) theory. The main task of this work is to compute one-loop $\beta$ function to obtain the low energy effective theory of the double sigma model. We implement the self-duality relation in the action to perform the one-loop calculation. At last, we obtain the DBI theory. We also rewrite this theory in terms of the generalized metric and scalar dilaton, and define the generalized scalar curvature and tensor from the equations of motion.

23 pages, the self-duality at the off-shell level and references changed

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• Doubling, T-Duality and Generalized Geometry: a Simple Model
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• Non-commutativity from the double sigma model
• Boundary Conditions and the Generalized Metric Formulation of the Double Sigma Model
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• Geometric Low-Energy Effective Action in a Doubled Spacetime
• Solution-generating transformations in duality-invariant theories and the fluid/gravity correspondence