Mainz 2014 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 83: Quantenfeldtheorie 1
T 83.3: Vortrag
Mittwoch, 26. März 2014, 17:15–17:30, P15
Dimensional reduction in asymptotically safe gravity — •Natalia Alkofer1, Daniel F. Litim2, and Bernd-Jochen Schaefer3 — 1Institut fuer Physik, Karl-Franzens Universitaet Graz, Austria — 2Department of Physics and Astronomy, University of Sussex, U.K. — 3Institut fuer Theoretische Physik, Justus-Liebig-Universitaet Gießen, Germany
The functional renormalisation group for the Einstein-Hilbert action is investigated for the case of four infinite (or large) and one compact dimensions. Results for the four- to five-dimensional crossover are presented employing two forms of the background field flow. Renormalisation group trajectories allowing for a significant lowering of the true Planck scale to the electroweak scale are identified. The behaviour of the running gravitational coupling at the crossover and the true Planck scale is discussed.