No matter how precise the measurement, matter and antimatter look stubbornly similar. An ultrasensitive experiment comparing protons with their antimatter counterparts found no difference in the ...

High precision: the BASE experiment at CERN has put tight limits on some properties of the antiproton. (Courtesy: Maximilien Brice/CERN/CC-BY-4.0) Precise measurements of the motions of antiprotons ...

As part of an experiment to measure -- to an extremely precise degree -- the charge-to-mass ratios of protons and antiprotons, the RIKEN-led BASE collaboration at CERN, Geneva, Switzerland, has found ...

The molecular hydrogen ion H₂⁺ is the simplest molecule. This simplicity makes it a perfect study object for physicists, as its properties—for example, its energy levels—can be calculated precisely.