Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-10-23
Nucl. Phys. B842:383-413, 2011
Physics
High Energy Physics
High Energy Physics - Theory
42 pages, references added, typos and minor errors corrected, discussion of boundary conditions extended. Version to appear in
Scientific paper
10.1016/j.nuclphysb.2010.09.008
We analyze properties of non-supersymmetric isometry-preserving perturbations to the infrared region of the warped deformed conifold, i.e. the Klebanov Strassler solution. We discuss both perturbations that "squash" the geometry, so that the internal space is no longer conformally Calabi-Yau, and perturbations that do not squash the geometry. Among the perturbations that we discuss is the solution that describes the linearized near-tip backreaction of a smeared collection of anti-D3-branes positioned in the deep infrared. Such a configuration is a candidate gravity dual of a non-supersymmetric state in a large-rank cascading gauge theory. Although anti-D3-branes do not directly couple to the 3-form flux, we argue that, due to the presence of the background imaginary self-dual flux, anti-D3-branes in the Klebanov-Strassler geometry necessarily produce singular non-imaginary self-dual flux. Moreover, since conformally Calabi-Yau geometries cannot be supported by non-imaginary self-dual flux, the anti-D3-branes squash the geometry as our explicit solution shows. We also briefly discuss supersymmetry-breaking perturbations at large radii and the effect of the non-supersymmetric perturbations on the gravitino mass.
McGuirk Paul
Shiu Gary
Sumitomo Yoske
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