Positronium-ion decay

Abstract

We present a precise theoretical prediction for the decay width of the bound state of two electrons and a positron (a negative positronium ion), Gamma(Ps^-) = 2.087 085(12)/ns. We include O(alpha^2) effects of hard virtual photons as well as soft corrections to the wave function and the decay amplitude. An outcome of a large-scale variational calculation, this is the first result for second-order corrections to a decay of a three-particle bound state. It will be tested experimentally in the new positronium-ion facility in Garching in Germany.

6 pages

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Cited by in corpus (6)

• Positrons in Surface Physics
• Annihilation, bound state properties and photodetachment of the positronium negatively charged ion
• Binding energy of the positronium negative ion via dimensional scaling
• Rare decays of the positronium ion and molecule, ${\text{Ps}}^{-}\to e^{-}\gamma$ and ${\text{Ps}}_2\to e^{+}{e}^{-}\gamma ,\gamma \gamma ,e^{+}{e}^{-}$
• Anomalous magnetic moment of the positronium ion
• Positronium hydride decay into proton, electron, and one or zero photons