# $R^4$ terms in supergravities via T-duality constraint

@article{Razaghian2018R4T,
title={\$R^4 \$ terms in supergravities via T-duality constraint},
author={H. Razaghian and M. R. Garousi},
journal={arXiv: High Energy Physics - Theory},
year={2018}
}
• Published 2018
• Physics
• arXiv: High Energy Physics - Theory
• It has been speculated in the literature that the effective actions of string theories at any order of $\alpha'$ should be invariant under the Buscher rules plus their higher covariant derivative corrections. This may be used as a constraint to find effective actions at any order of $\alpha'$, in particular, the metric, the B-field and the dilaton couplings in supergravities at order $\alpha'^3$ up to an overall factor. For the simple case of zero B-field and diagonal metric in which we have… CONTINUE READING

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