4 papers
On Realistic Brane Worlds from Type I Strings
G. Aldazabal, L. Ibanez, F. Quevedo
We review recent progress in constructing realistic brane models from type I string vacua. Explicit models with three families of the standard model gauge group and its left-right…
Constant versus Field Dependent Gauge Couplings in Supersymmetric Theories
C. P. Burgess, A. de la Macorra, I. Maksymyk +1
We briefly discuss the differences between considering the gauge coupling as a constant or as a field, the dilaton, in N=1 supersymmetric theories. We emphasize the differences reg…
Duality Beyond Global Symmetries: the Fate of the B_{μν} Field
Fernando Quevedo
Duality between the `axion' field and the antisymmetric tensor field is traced after a nonperturbative effect, gaugino condensation, breaks the Peccei-Quinn symmetry $…
Noncompact Coset Spaces in String Theory
Fernando Quevedo
A brief overview of strings propagating on noncompact coset spaces G/H is presented in terms of WZW models. The role played by isometries in the existence of target space duality a…