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hep-ph2025
The weak decay constant of positronium
Milena Piotrowska, Francesco Giacosa
The positronium, as the lightest purely leptonic bound state, provides an ideal testing ground for a quantum field--theoretical (QFT) description of composite systems. While its el…
hep-ph2025
Two-photon decay of para-positronium within a composite approach
Milena Piotrowska, Francesco Giacosa
The decay of the para-positronium into two photons is studied in the framework of a composite Quantum Field Theoretical approach. This amounts to the evaluation of the electron-pos…