Hyperfine Interactions

, Volume 138, Issue 1–4, pp 171–174 | Cite as

Low Temperature Hydrogen Antihydrogen Interactions

  • E. A. G. Armour
  • C. W. Chamberlain


In view of current interest in the trapping of antihydrogen (\(\bar {\mathcal{H}}\)) atoms at low temperatures [1–3], we have carried out a full four-body variational calculation to determine s-wave elastic phase shifts for hydrogen antihydrogen scattering, using the Kohn Variational Principle. Terms outside the Born–Oppenheimer approximation have been taken into account using the formalism of Kołos and Wolniewicz [4]. As far as we are aware, this is the first time that these terms have been included in an H \(\bar {\mathcal{H}}\) scattering calculation. This is a continuation of earlier work on H–\(\bar {\mathcal{H}}\) interactions [5–7]. Preliminary results differ substantially from those calculated using the Born–Oppenheimer approximation [8–10]. A method is outlined for reducing this discrepancy and taking the rearrangement channel into account.

antihydrogen hydrogen elastic scattering protonium positronium 


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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • E. A. G. Armour
    • 1
  • C. W. Chamberlain
    • 2
  1. 1.School of Mathematical SciencesUniversity of NottinghamNottinghamUK
  2. 2.School of Mathematical SciencesUniversity of NottinghamNottinghamUK

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