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T: Teilchenphysik

T 403: Kosmologie I

T 403.2: Vortrag

Mittwoch, 29. März 2006, 16:40–17:00, HG2-HS5

Quantum gravity in extra dimensions — •Peter Fischer¹ und Daniel.F. Litim^2,3 — ¹Institut fuer Theoretische Physik, RWTH Aachen, 52056 Aachen — ²Theory Division, CERN, CH-1211, Geneva 23 — ³School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK

Field theoretic models in extra dimensions have recently received considerable interest. We study quantum gravity in extra dimensions with renormalisation group methods. A non-trivial fixed point is detected within the Einstein-Hilbert truncation. Its stability properties and universal eigenvalues are deduced for arbitrary gauge fixing parameter. If the fixed point persists within extended truncations, quantum gravity in extra dimensions is asymptotically safe, i.e. non-perturbatively renormalisable. Phenomenological implications of this result are indicated.