Scientists are about to test Einstein’s gravity with exotic matter
Researchers at ETH Zurich and the Paul Scherrer Institute (PSI) are preparing an experiment to test how gravity affects muons, a heavier particle from the second generation of matter. This experiment aims to verify Einstein's equivalence principle for exotic matter, addressing a fundamental mystery in particle physics about why multiple generations of particles exist.
Why it matters
This research could challenge or confirm fundamental assumptions about gravity and the Standard Model of particle physics, potentially leading to new discoveries about the universe's basic laws and our understanding of matter.
Does gravity affect every type of particle in exactly the same way? Researchers at ETH Zurich and the Paul Scherrer Institute (PSI) in Villigen are preparing an experiment that could test that fundamental assumption using one of nature's more unusual particles.
"We have taken an important step towards carrying out an exciting experiment on this topic," says the professor of physics: "We want to measure the gravitational interaction of the muon."
The familiar matter that makes up people, planets, and nearly everything around us consists of protons, neutrons, and electrons. Physicists classify these particles as belonging to the first generation of matter. Two additional generations also exist, made up of heavier particles. One of them is the muon, a heavier relative of the electron that belongs to the second generation.
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