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14.08.2015 | High-precision comparison of the antiproton-to-proton charge-to-mass ratio

Copyright: CERN

Penning trap

 

In a paper published on August 12th in Nature, the Baryon Antibaryon Symmetry Experiment at CERN's Antiproton Decelerator, reports the most precise comparison of the charge-to-mass ratio of the proton to that of its antimatter equivalent, the antiproton. The charge-to-mass ratio — an important property of particles — can be measured by observing the oscillation of a particle in a magnetic field. The new result shows no difference between the proton and the antiproton, with a four-fold improvement in the energy resolution compared with previous measurements.

Press release of CERN


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Penning trap
A cut-away schematic of the Penning trap system used by the experiment.
Copyright: CERN