Abstract
Abstract
For the first time correct results of the decay rates of
to two photons and into the final state electron-positron pair (radiationless) were calculated using the spin-singlet configuration of
(see Aslam M. J. et al., Phys. Rev. A, 104 (2021) 052803). We revisited the calculation of these decays without considering any particular spin orientation of initial state
, and performed an automated calculation using the Mathematica-based computational packages FeynArts and FeynCalc. Our results are consistent with those of Aslam et al., affirming that the only contribution to these rates comes from singlet-singlet spin orientations of pairs of initial state electrons and positrons in
.
Subject
General Physics and Astronomy