Double Field Theory at SL(2) angles

Authors: Franz Ciceri, Giuseppe Dibitetto, Jose Juan Fernandez-Melgarejo, Adolfo Guarino

Preprint Number: UUITP-33/16

An extended field theory is presented that captures the full SL(2)xO(6,6+n) duality group of four-dimensional half-maximal supergravities. The theory has section constraints whose two inequivalent solutions correspond to minimal D=10 supergravity and chiral half-maximal D=6 supergravity, respectively coupled to vector and tensor multiplets. The relation with O(6,6+n) heterotic double field theory is thoroughly discussed. Non-Abelian interactions as well as background fluxes are captured by a deformation of the generalised diffeomorphisms. Finally, making use of the SL(2) duality structure, it is shown how to generate gaugings with non-trivial de Roo-Wagemans angles via generalised Scherk-Schwarz ansatze. Such gaugings allow for moduli stabilisation including the SL(2) dilaton.