Department of Physics Papers

Title

Hierarchies from D-brane Instantons in Globally Defined Calabi-Yau Orientifolds

Document Type

Journal Article

Date of this Version

6-24-2008

Comments

Suggested Citation:
M. Cvetič and T. Weigand. (2008). "Hierarchies from D-brane Instantons in Globally Defined Calabi-Yau Orientifolds." Physical Review Letters. 100, 251601.

© 2008 The American Physical Society
http://dx.doi.org/10.1103/PhysRevLett.100.251601.

Abstract

We construct the first globally consistent semirealistic type I string vacua on an elliptically fibered manifold where the zero modes of the Euclidean D1-instanton sector allow for the generation of nonperturbative Majorana masses of an intermediate scale. In another class of global models, a D1-brane instanton can generate a Polonyi-type superpotential breaking supersymmetry at an exponentially suppressed scale.

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Date Posted: 25 January 2011

This document has been peer reviewed.