Related Experiment Video
Updated: Jun 29, 2026

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
Published on: August 30, 2013
Fixed points of higher-derivative gravity
Alessandro Codello1, Roberto Percacci
1Dipartimento di Fisica Teorica, Università di Trieste, Viale Miramare, I-34014 Trieste, Italy. a.codello@gmail.com
Abstract:
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.
Related Concept Videos
Finding the Center of Gravity
Gravity between Spherical Bodies
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
One-Degree-of-Freedom System
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
Gravitational Potential Energy for Extended Objects
The Principle of Superposition and the Gravitational Field
Higher Derivatives

