Near-threshold production of antihydrogen positive ion in positronium-antihydrogen collision

Takuma Yamashita, Yasushi Kino, Emiko Hiyama, Svante Jonsell, Piotr Froelich

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Near-threshold production of antihydrogen ion (H¯+) in positronium-antihydrogen collisions is predicted by a rigorous four-body scattering calculation. The convergence of the cross sections for the rearrangement and for all competing reactions (elastic scattering, de/excitation and de/polarization of positronium) is carefully examined against partial waves. The multi-channel scattering solutions are composed of functions that diagonalize the four-body Hamiltonian, and scattering functions that satisfy the correct asymptotic boundary conditions. The production rates of H¯+ show large discrepancies compared to more approximate calculations.

Original languageEnglish
Article number012001
JournalNew Journal of Physics
Issue number1
Publication statusPublished - 2021 Jan


  • Antihydrogen
  • Antihydrogen positive ion
  • Four-body calculation
  • Positronium

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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