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arXiv · 1411.5696

Heterotic Effective Action and Duality Symmetries Revisited

Olaf Hohm·Ashoke Sen·Barton Zwiebach
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Abstract

The dimensional reduction of heterotic supergravity with gauge fields truncated to the Cartan subalgebra exhibits a continuous O(d,d+16;R) global symmetry, related to the O(d,d+16;Z) T-duality of heterotic strings on a d-torus. The O(d,d+16;R) symmetry is not present, however, if the supergravity reduction is done including the full set of E_8 x E_8 or SO(32) gauge fields. We analyze which duality symmetries are realized to all orders in $α'$ in the proper effective field theories for the massless string states. We find a universal O(d,d;R) symmetry, also predicted by double field theory. We confirm this by giving a novel formulation of the dimensionally reduced supergravity in terms of O(d,d) multiplets, and we discuss cases of symmetry enhancement.

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Olaf Hohm, Ashoke Sen, Barton Zwiebach. 2015-02-11. Heterotic Effective Action and Duality Symmetries Revisited. https://doi.org/10.1007/jhep02(2015)079

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