Four-derivative interactions in asymptotically safe gravity

Details Four-derivative interactions in asymptotically safe gravity Four-derivative interactions in asymptotically safe gravity

2009-09-17

arxiv.org/abs/0909.3265v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 1 figure; to appear in the Proceedings of the XXV Max Born Symposium "The Planck Scale", Wroclaw, 29 June - 3 July, 2

Scientific paper

We summarize recent progress in understanding the role of higher-derivative terms in the asymptotic safety scenario of gravity. Extending previous computations based on the functional renormalization group approach by including a Weyl-squared term in the ansatz for the effective action, further evidence for the existence of a non-Gaussian fixed point is found. The fixed point also persists upon including a minimally coupled free scalar field, providing an explicit example of perturbative counterterms being non-hazardous for asymptotic safety.

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