We analyze a class of dual pairs of heterotic and type I models based on freely-acting Z2×Z2 orbifolds in four dimensions. Using the adiabatic argument, it is possible to calculate non-perturbative contributions to the gauge coupling threshold corrections on the type I side by exploiting perturbative calculations on the heterotic side, without the drawbacks due to twisted moduli. The instanton effects can then be combined with closed-string fluxes to stabilize most of the moduli fields of the internal manifold, and also the dilaton, in a racetrack realization of the type I model.
Camara, P., Dudas, E., Maillard, T., Pradisi, G. (2008). String Instanton, Fluxes and Moduli Stabilization. NUCLEAR PHYSICS. B, 795(1-2), 453-489 [http://dx.doi.org/10.1016/j.nuclphysb.2007.11.026].
String Instanton, Fluxes and Moduli Stabilization
PRADISI, GIANFRANCO
2008-01-01
Abstract
We analyze a class of dual pairs of heterotic and type I models based on freely-acting Z2×Z2 orbifolds in four dimensions. Using the adiabatic argument, it is possible to calculate non-perturbative contributions to the gauge coupling threshold corrections on the type I side by exploiting perturbative calculations on the heterotic side, without the drawbacks due to twisted moduli. The instanton effects can then be combined with closed-string fluxes to stabilize most of the moduli fields of the internal manifold, and also the dilaton, in a racetrack realization of the type I model.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
