Schematic of the measurement and the reservoir Penning traps. Credit http://dx.doi.org/10.1038/nature14861
In a stringent test of a fundamental property of the standard model of particle physics, known as CPT symmetry, researchers from the RIKEN-led BASE collaboration at CERN have made the most precise measurements so far of the charge-to-mass ratio of protons and their antimatter counterparts, antiprotons. The work was carried out using CERN’s Antiproton Decelerator, a device that provides low-energy antiprotons for antimatter studies.
All measured antiproton-to-H− cyclotron frequency ratios as a function of time Credit: http://dx.doi.org/10.1038/nature14861
CPT invariance – which the experiment was meant to test – means that a system remains unchanged if three fundamental properties a...
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