Possible resolution of the Brookhaven and Washington Eötvös experiments

Abstract

Seemingly contradictory results from E\"otv\"os-type experiments have been reported by Thieberger and by Adelberger and collaborators. Attempts to reconcile the discrepancy have mainly focused on a single moderate-ranged (of order hundreds of meters) force, coupled to various charges. However, because the local geologies are significantly different in these two experiments, they may be compatible with an alternative scenario: new spin-1 graviphoton and spin-0 graviscalar partners of the graviton, both with longer ranges (tens to hundreds of kilometers). We discuss this and other new data in terms of these two concepts.