12 papers
-Bootstrap
Achilleas Gitsis, Falk Hassler, Luca Scala
Due to the exponential growth in the number of terms, computing -corrections to string theory's low-energy effective actions is a challenging matter. In order to fix all the c…
All-order generalized Green-Schwarz transformations
Achilleas Gitsis, Falk Hassler
Compatibility with T-duality severely constrains higher-derivative corrections to the low-energy supergravity limits of string theory. For example, it suggests that Lorentz transfo…
Consistent truncation and generalized duality based on exceptional generalized cosets
Falk Hassler, Yuho Sakatani
We present a systematic framework for constructing consistent truncations of supergravity based on exceptional generalized cosets of the form $\GS \backslash G/H$. This approach ge…
Gauged Extended Field Theory and Generalised Cartan Geometry
Falk Hassler, David Osten, Alex Swash
Cartan geometry provides a unifying algebraic construction of curvature and torsion, based on an underlying model Lie algebra -- a viewpoint that can be extended naturally to the h…
Unraveling the generalized Bergshoeff-de Roo identification
Achilleas Gitsis, Falk Hassler
We revisit duality-covariant higher-derivative corrections which arise from the generalized Bergshoeff-de Roo (gBdR) identification, a prescription that gives rise to a two paramet…
Duality covariant curvatures for the heterotic string
Falk Hassler, David Osten, Yuho Sakatani
Duality covariant curvature and torsion tensors in double field theory/generalized geometry are central in analyzing consistent truncations, generalized dualities, and related inte…