https://doi.org/10.1140/epjc/s10052-019-7357-4
Regular Article - Theoretical Physics
Effective action of bosonic string theory at order 
Department of Physics, Faculty of Science, Ferdowsi University of Mashhad, P.O. Box 1436, Mashhad, Iran
* e-mail: garousi@um.ac.ir
Received:
13
August
2019
Accepted:
29
September
2019
Published online:
8
October
2019
Recently, it has been shown that the gauge invariance requires the minimum number of independent couplings for B-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.
© The Author(s), 2019
