Publications by Andre Lukas

The edge of supersymmetry: Stability walls in heterotic theory

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 677 (2009) 190-194

LB Anderson, JA Gray, A Lukas, BA Ovrut

We explicitly describe, in the language of four-dimensional N = 1 supersymmetric field theory, what happens when the moduli of a heterotic Calabi-Yau compactification change so as to make the internal non-Abelian gauge fields non-supersymmetric. At the edge of the region in Kähler moduli space where supersymmetry can be preserved, an additional anomalous U (1) gauge symmetry appears in the four-dimensional theory. The D-term contribution to the scalar potential associated to this U (1) attempts to force the system back into a supersymmetric configuration and provides a consistent low-energy description of gauge bundle stability. © 2009 Elsevier B.V. All rights reserved.

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