The anti-proton charge radius

Abstract

The upcoming operation of the Extra Low ENergy Antiprotons (ELENA) ring at CERN, the upgrade of the anti-proton decelerator (AD), and the installation in the AD hall of an intense slow positron beam with an expected flux of $10^8$ e${}^{+}$/s will open the possibility for new experiments with anti-hydrogen ($\bar{\text{H}}$). Here we propose a scheme to measure the Lamb shift of $\bar{\text{H}}$. For a month of data taking, we anticipate an uncertainty of 100 ppm. This will provide a test of CPT and the first determination of the anti-proton charge radius at the level of 10%.

5 pages, 4 Figures, v4 refs 19 added

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Cited by in corpus (4)

• Hyperfine spectroscopy of hydrogen and antihydrogen in ASACUSA
• Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
• Production and study of antideuterium with the GBAR beamline
• Hyperfine spectroscopy of antihydrogen, hydrogen, and deuterium