Fixed Points of Higher Derivative Gravity

Details Fixed Points of Higher Derivative Gravity Fixed Points of Higher Derivative Gravity

2006-07-19

arxiv.org/abs/hep-th/0607128v2

Phys.Rev.Lett.97:221301,2006

Physics

High Energy Physics

High Energy Physics - Theory

Introduction expanded, some references added

Scientific paper

10.1103/PhysRevLett.97.221301

We recalculate the beta functions of higher derivative gravity in four dimensions using the one--loop approximation to an Exact Renormalization Group Equation. We reproduce the beta functions of the dimensionless couplings that were known in the literature but we find new terms for the beta functions of Newton's constant and of the cosmological constant. As a result, the theory appears to be asymptotically safe at a non--Gaussian Fixed Point, rather than perturbatively renormalizable and asymptotically free.

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