Answers are grounded in this paper and cite their sources.
We report the details of an improved Galilean experiment involving simultaneous free fall in vacuum of concentric masses with different compositions. This experiment is sensitive to composition-dependent interactions between the falling masses and the Earth for forces with ranges exceeding 10 km or so that are less accessible to torsion balance experiments. No composition dependence was observed. Limits on baryon, isospin, and lepton couplings are presented for both Yukawa and exponential forms.
No takes yet. Share an insight, caveat, or question.
Kuroda et al. (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: