Enhancement of antihydrogen formation in antiproton collisions with excited-state positronium

[摘要] Antihydrogen formation in positronium scattering on antiprotons is investigated using the two-centre convergent close-coupling method. A several orders of magnitude enhancement in the formation of antihydrogen is found when positronium is in an excited state. The effect is greatest at the lowest energies considered which encompass those achievable in experiment. This suggests a practical approach to creating neutral antimatter for testing its interaction with gravity and for spectroscopic measurements.

[发布机构] ARC Centre for Antimatter-Matter Studies, Curtin University, GPO Box U1987, Perth; WA; 6845, Australia^1;Department of Physics, College of Science, Swansea University, SA2 8PP, United Kingdom^2

[关键词] Antihydrogen;Antihydrogen formation;Convergent close coupling methods;Orders of magnitude;Spectroscopic measurements