2026/07/29 by Walter H. Baron, Fabian A. Portilla
Physics and Astronomy · #hep-th
25 pages
arxiv created 2026/07/29 · arxiv updated 2026/07/30
The effective action of string theory has a highly constrained structure due to the numerous symmetries of the underlying theory. Recently, a method known as the Generalized Bergshoeff-de Roo identification was developed, which exploits diffeomorphism, Lorentz and gauge invariance, along with T-duality, to derive higher-derivative couplings in the effective action within the framework of Double Field Theory. This method has been revisited and further refined to generate couplings directly within the standard Supergravity framework.