From: H LV
A beam of electrons should bend downward in earths gravity. Has that ever been
Experiments to determine the Force of Gravity on Single Electrons and Positrons
• FRED C. WITTEBORN
• & WILLIAM M. FAIRBANK
• Nature volume 220, pages 436–440 (02 November 1968)
Behind a paywall - but the consensus seems to be this: the experiment
partially but not fully supports the generally held view that gravity affects
the electron or positron.
Mills would say it is a poor experiment and not proof.