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On the Four-Dimensional Effective Action of Strongly Coupled Heterotic String Theory

Andre Lukas·Burt A. Ovrut·Daniel Waldram
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Abstract

The low-energy D=4, N=1 effective action of the strongly coupled heterotic string is explicitly computed by compactifying Horava-Witten theory on the deformed Calabi-Yau three-fold solution due to Witten. It is shown that, to order kappa^{2/3}, the Kahler potential is identical to that of the weakly coupled theory. Furthermore, the gauge kinetic functions are directly computed to order kappa^{4/3} and shown to receive a non-vanishing correction. Also, we compute gauge matter terms in the Kahler potential to the order kappa^{4/3} and find a nontrivial correction to the dilaton term. Part of those corrections arise from background fields that depend on the orbifold coordinate and are excited by four-dimensional gauge field source terms.

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Andre Lukas, Burt A. Ovrut, Daniel Waldram. 1997-12-20. On the Four-Dimensional Effective Action of Strongly Coupled Heterotic String Theory. https://doi.org/10.1016/s0550-3213(98)00463-5

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