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

  title={\$R^4 \$ terms in supergravities via T-duality constraint},
  author={H. Razaghian and M. R. Garousi},
  journal={arXiv: High Energy Physics - Theory},
  • H. Razaghian, M. R. Garousi
  • 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