Content overview: “ETH Zurich and PSI Team Launch Groundbreaking Muon Beam Experiment to Test Einstein’s Grav”. A pioneering experiment led by physics professor Anna Soter at ETH Zurich, in collaboration with the Paul Scherrer Institute (PSI) in Villigen, is pushing... A pioneering experiment led by physics professor Anna Soter at ETH Zurich, in collaboration with the Paul Scherrer Institute (PSI) in Villigen, is pushing the boundaries of gravitational physics. The team has successfully developed a novel particle beam focused on muons—subatomic particles similar to electrons but with greater mass—to probe whether gravity treats all matter equally.
This research directly challenges a foundational assumption of Einstein’s general theory of relativity, which posits that gravity affects all objects the same way regardless of composition or internal structure. By measuring the gravitational interaction of muons, scientists aim to detect any deviations that could signal new physics beyond the standard model. For the complete material, the listing points back to the source inside the network.