Apparent Lorentz violation through spacetime-varying couplings

Details Apparent Lorentz violation through spacetime-varying couplings Apparent Lorentz violation through spacetime-varying couplings

2003-08-20

arxiv.org/abs/hep-ph/0308208v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages; Presented at the 4th Meeting on New Worlds in Astroparticle Physics

Scientific paper

In this talk, we explore the relation between smoothly varying couplings and Lorentz violation. Within the context of a supergravity model, we present an explicit mechanism that causes the effective fine-structure parameter and the effective electromagnetic $\theta$ angle to acquire related spacetime dependences. We argue that this leads to potentially observable Lorentz violation and discuss some implications for the Standard-Model Extension.

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