String Theoretic Bounds on Lorentz-Violating Warped Compactification

Details String Theoretic Bounds on Lorentz-Violating Warped Compactification String Theoretic Bounds on Lorentz-Violating Warped Compactification

2003-01-24

arxiv.org/abs/hep-th/0301189v3

JHEP 0304 (2003) 012

Physics

High Energy Physics

High Energy Physics - Theory

20pg, JHEP3; v2 additional references, slight change to intro; v3. added reference

Scientific paper

10.1088/1126-6708/2003/04/012

We consider warped compactifications that solve the 10 dimensional supergravity equations of motion at a point, stabilize the position of a D3-brane world, and admit a warp factor that violates Lorentz invariance along the brane. This gives a string embedding of ``asymmetrically warped'' models which we use to calculate stringy (\alpha') corrections to standard model dispersion relations, paying attention to the maximum speeds for different particles. We find, from the dispersion relations, limits on gravitational Lorentz violation in these models, improving on current limits on the speed of graviton propagation, including those derived from field theoretic loops. We comment on the viability of models that use asymmetric warping for self-tuning of the brane cosmological constant.

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