| Issue |
EPL
Volume 141, Number 4, February 2023
|
|
|---|---|---|
| Article Number | 44003 | |
| Number of page(s) | 4 | |
| Section | Nuclear and plasma physics, particles and fields | |
| DOI | https://doi.org/10.1209/0295-5075/acba43 | |
| Published online | 22 February 2023 | |
Revisiting the radiative and non-radiative decays of di-positronium (Ps2)
1 Department of Physics, Quaid-i-Azam University - Islamabad, Pakistan
2 Department of Physics, University of Alberta - Edmonton, Alberta T6G 2E1, Canada
(a) E-mail: sardarzayad99@gmail.com (corresponding author)
Received: 3 October 2022
Accepted: 8 February 2023
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 .
© 2023 EPLA
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