title: Hydrogen-antihydrogen collisions
abstract: Matter-antimatter interactions are investigated using hydrogen-antihydrogen collisions as an example. Cross sections for elastic scattering and for the antihydrogen loss (either through the rearrangement reaction, resulting in formation of protonium and positronium according to H+&Hmacr;-->p&pmacr;+e(+)e(-), or via annihilation in flight) are calculated for the first time in a fully quantum mechanical approach. Implications for experiments intending to trap and cool antihydrogen are discussed.
authors.affiliation: Department of Quantum Chemistry, Uppsala University, Box 518, 75120 Uppsala, Sweden.
authors.initials: P
authors.lastname: Froelich
authors.initials: S
authors.lastname: Jonsell
authors.initials: A
authors.lastname: Saenz
authors.initials: B
authors.lastname: Zygelman
authors.initials: A
authors.lastname: Dalgarno