Model Comparison tests of modified gravity from the E\"ot-Wash experiment

Understand

Perivolaropoulos et al (arXiv:1904.09462) (P19) have argued that the residual torque data in the E\"ot-Wash experiment is consistent with an oscillating signal.

• This could either be a signature of non-local modified gravity theories or some other systematic error in the data.
• We independently assess the viability of such an oscillating signal in the same data using Bayesian and information theoretical criterion, to complement the frequentist analysis in P19.
• We fit this data to three different parametrizations (an offset Newtonian, Yukawa, and an oscillating model), and assess the significance of the oscillating model using AIC, BIC, WAIC, and Bayes factor.