Effective action of bosonic string theory at order $ \alpha'^2 $
High Energy Physics - Theory
2020-02-14 v3
Abstract
Recently, it has been shown that the gauge invariance requires the minimum number of independent couplings for -field, metric and dilaton at order to be 60. In this paper we fix the corresponding 60 parameters in string theory by requiring the couplings to be invariant under the global T-duality transformations. The Riemann cubed terms are exactly the same as the couplings that have been found by the S-matrix calculations.
Keywords
Cite
@article{arxiv.1907.06500,
title = {Effective action of bosonic string theory at order $ \alpha'^2 $},
author = {Mohammad R. Garousi},
journal= {arXiv preprint arXiv:1907.06500},
year = {2020}
}
Comments
18 pages, Latex file, no figure; V2: the version appears in EPJC; V3: a sign typo corrected