Researchers at PSI created an intense, cold beam of exotic atoms—muonium, containing second-generation antiparticles—to test Einstein’s universality of free fall.

Researchers at PSI created an intense, cold beam of exotic atoms—muonium, containing second-generation antiparticles—to test Einstein’s universality of free fall.
Researchers at PSI created an intense, cold beam of exotic atoms—muonium, containing second-generation antiparticles—to test Einstein’s universality of free fall.