Cross Section for Rydberg Antihydrogen Production via Charge Exchange   Between Rydberg Positronium and Antiprotons in Magnetic Field
  The antihydrogen formation by charge exchange between cold antiprotons and Rydberg positronium Ps is studied by using the Classical Trajectory Monte Carlo (CTMC) method. 
D. Krasnicky, R. Caravita, C. Canali, and G. Testera
physics.atom-ph