Production and study of antideuterium with the GBAR beamline

Abstract

The potential of circulating antideuterons ($\overline{\mathrm{d}}$) in the AD/ELENA facility at CERN is under active investigation. Approximately 100 $\overline{\mathrm{d}}$ per bunch could be delivered as a $100\mathrm{keV}$ beam based on measured cross-sections. These $\overline{\mathrm{d}}$ could be further decelerated to $12\mathrm{keV}$ using the GBAR scheme, enabling the synthesis of antideuterium ($\overline{\mathrm{D}}$) via charge exchange with positronium, a technique successfully demonstrated with $6\mathrm{keV}$ antiprotons for antihydrogen production. The AD/ELENA facility is currently studying the possibility of increasing the $\overline{\mathrm{d}}$ rate using an optimized new target geometry. Assuming this is feasible, we propose further enhancing the anti-atom production by using laser-excited positronium in the $2P$ state within a cavity, which is expected to increase the $\overline{\mathrm{D}}(2S)$ production cross-section by almost an order of magnitude for $\overline{\mathrm{d}}$ with $2\mathrm{keV}$ energy. We present the projected precision for measuring the antideuterium Lamb shift and extracting the antideuteron charge radius, as a function of the beam flux.

References in corpus (11)

• Matter and Antimatter in the Universe
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Cited by in corpus (1)

• Bound Deuteron-Antideuteron System (Deuteronium): Leading Radiative and Internal-Structure Corrections to Bound-State Energies