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arXiv · hep-th/9512081

Heterotic - type I superstring duality and low-energy effective actions

A. A. Tseytlin
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Abstract

We compare order $R^4$ terms in the 10-dimensional effective actions of SO(32) heterotic and type I superstrings from the point of view of duality between the two theories. Some of these terms do not receive higher-loop corrections being related by supersymmetry to `anomaly-cancelling' terms which depend on the antisymmetric 2-tensor. At the same time, the consistency of duality relation implies that the `tree-level' $R^4$ super-invariant (the one which has $ζ(3)$-coefficient in the sphere part of the action) should appear also at higher orders of loop expansion, i.e. should be multiplied by a non-trivial function of the dilaton.

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A. A. Tseytlin. 1995-12-11. Heterotic - type I superstring duality and low-energy effective actions. https://doi.org/10.1016/0550-3213(96)00080-6

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