Excision of Singularities by Stringy Domain Walls

Details Excision of Singularities by Stringy Domain Walls Excision of Singularities by Stringy Domain Walls

2000-10-30

arxiv.org/abs/hep-th/0010271v1

J.Math.Phys. 42 (2001) 3071-3081

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 3 figures

Scientific paper

10.1063/1.1373424

We study supersymmetric domain walls on S_1/Z_2 orbifolds. The supergravity solutions in the bulk are given by the attractor equation associated with Calabi-Yau spaces and have a naked space-time singularity at some |y_s|. We are looking for possibilities to cut off this singularity with the second wall by a stringy mechanism. We use the collapse of the CY cycle at |y_c| which happens before and at a finite distance from the space-time singularity. In our example with three Kahler moduli the second wall is at the end of the moduli space at |y_c| where also the enhancement of SU(2) gauge symmetry takes place so that |y_e|=|y_c|< |y_s|. The physics of the excision of a naked singularity via the enhancon in the context of domain wall has an interpretation on the heterotic side related to R -> 1/R duality. The position of the enhancon is given by the equation R(|y_e|)=1.

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