Constraining the fundamental interactions and couplings with E\"otv\"os experiments

TL;DR

This paper refines constraints on violations of the Weak Equivalence Principle and variations of fundamental constants using high-precision Eötvös experiments, providing model-independent bounds on fundamental interactions.

Contribution

It offers updated, comprehensive limits on fundamental interaction violations and constant variations based on the full set of high-accuracy Eötvös experiments, including model-independent analyses.

Findings

Stronger bounds on WEP violation parameters.

Constraints on spatial variation of fundamental constants.

Limits on gauge sector parameters from Standard Model structure.

Abstract

Upper bounds for the violation of the Weak Equivalence Principle (WEP) by the Fundamental Interactions have been given before. We now recompute the limits on the parameters measuring the strength of the violation with the whole set of high accuracy E\"{o}tv\"{o}s experiments. Besides, limits on spatial variation of the Fundamental Constants \alpha, Weinberg angle \theta, and v, the vacuum expectation value of the Higgs field, are found in a model independent way. Limits on other parameters in the gauge sector are also found from the strucutre of the Standard Model.