Abstract
The charge exchange reaction \(\bar {\mathrm {p}} + \text {Ps} \rightarrow \mathrm {e}^{-} + \bar {\mathrm {H}} \), of interest for the future experiments (GBAR, AEGIS, ATRAP, ...) aiming to produce antihydrogen atoms, is investigated in the energy range between the \(\mathrm {e}^{-}+\bar {\mathrm {H}}(n = 2)\) and \(\mathrm {e}^{-}+\bar {\mathrm {H}}(n = 3)\) thresholds. An ab-initio method based on the solution of the Faddeev-Merkuriev equations is used. Special focus is put on the impact of the Feshbach resonances and the Gailitis-Damburg oscillations, appearing in the vicinity of the \(\bar {\mathrm {p}} +\text {Ps}(n = 2)\) threshold, on the \(\bar {\mathrm {H}}\) production cross section.
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Acknowledgments
This work was granted access to the HPC resources of TGCC/IDRIS under the allocation 2016-x2016056006 made by GENCI (Grand Equipement National de Calcul Intensif). Part of the calculations have been also realized at Mésocentre (Université de Strasbourg).
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This article is part of the Topical Collection on Proceedings of the 13th International Conference on Low Energy Antiproton Physics (LEAP 2018) Paris, France, 12-16 March 2018
Edited by Paul Indelicato, Dirk van der Werf, and Yves Sacquin
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Dufour, M., Valdes, M., Lazauskas, R. et al. Antihydrogen formation via antiproton scattering on positronium between the \(e^{-} +\bar {H}(n = 2)\) and \(e^{-}+\bar {H}(n = 3)\) thresholds. Hyperfine Interact 239, 41 (2018). https://doi.org/10.1007/s10751-018-1515-1
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DOI: https://doi.org/10.1007/s10751-018-1515-1