Frequentist model comparison tests of sinusoidal variations in measurements of Newton's gravitational constant
Department of Physics, IIT Hyderabad - Kandi, Telangana-502285, India
Received: 28 June 2016
Accepted: 28 July 2016
In 2015, Anderson et al. (EPL, 110 (2015) 10002) have claimed to find evidence for periodic sinusoidal variations (period = 5.9 years) in measurements of Newton's gravitational constant. These claims have been disputed by Pitkin (EPL, 111 (2015) 30002). Using the Bayesian model comparison, he argues that a model with an unknown Gaussian noise component is favored over any periodic variations by more than e30. We re-examine the claims of Anderson et al. using frequentist model comparison tests, both with and without errors in the measurement times. Our findings lend support to Pitkin's claim that a constant term along with an unknown systematic offset provides a better fit to the measurements of Newton's constant, compared to any sinusoidal variations.
PACS: 06.20.Jr – Determination of fundamental constants / 04.80.-y – Experimental studies of gravity / 06.30.Gv – Velocity, acceleration, and rotation
© EPLA, 2016