Fixed points of quantum gravity in extra dimensions

Details Fixed points of quantum gravity in extra dimensions Fixed points of quantum gravity in extra dimensions

2006-02-21

arxiv.org/abs/hep-th/0602203v2

Phys.Lett.B638:497-502,2006

Physics

High Energy Physics

High Energy Physics - Theory

Wording sharpened, refs added, to appear in PLB

Scientific paper

10.1016/j.physletb.2006.05.073

We study quantum gravity in more than four dimensions with renormalisation group methods. We find a non-trivial ultraviolet fixed point in the Einstein-Hilbert action. The fixed point connects with the perturbative infrared domain through finite renormalisation group trajectories. We show that our results for fixed points and related scaling exponents are stable. If this picture persists at higher order, quantum gravity in the metric field is asymptotically safe. We discuss signatures of the gravitational fixed point in models with low-scale gravity and compact extra dimensions.

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