Hyperfine Interactions

, 239:41 | Cite as

Antihydrogen formation via antiproton scattering on positronium between the \(e^{-} +\bar {H}(n = 2)\) and \(e^{-}+\bar {H}(n = 3)\) thresholds

  • Marianne DufourEmail author
  • Mateo Valdes
  • Rimantas Lazauskas
  • Paul-Antoine Hervieux
Part of the following topical collections:
  1. Proceedings of the 13th International Conference on Low Energy Antiproton Physics (LEAP 2018) Paris, France, 12-16 March 2018


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.


Faddeev-Merkuriev equations Feshbach resonances Gailitis oscillations Antimatter GBAR 

PACS 03.65.Nk 34.80.Lx 



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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© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.CNRS, IPHC UMR 7178Université de StrasbourgStrasbourgFrance
  2. 2.CNRS, IPCMS UMR 7504Université de StrasbourgStrasbourgFrance

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