Rare decays of the positronium ion and molecule, ${\text{Ps}}^{-}\to e^{-}\gamma$ and ${\text{Ps}}_2\to e^{+}{e}^{-}\gamma ,\gamma \gamma ,e^{+}{e}^{-}$

M. Jamil Aslam, Wen Chen, Andrzej Czarnecki +2

Decay rates of the positronium molecule ${\text{Ps}}_2$ into two photons and into an electron-positron pair are determined. Previous studies find that these rates are very differen…