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Fall 2017
We determine the rates, photon energy and angular distributions of positronium decays into a photon and a neutrino-antineutrino pair, $\text{Ps} \to \gamma \nu\ell \bar\nu\ell$. We find that both positronium spin states have access to this decay channel, contrary to a previously published...
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Spring 2021
This study of bound states composed of short-lived particles (i.e., positron and muon) serves a common purpose to describe their bound properties precisely. The calculation of a scattering amplitude can be lengthy and cumbersome when we have a specific spin preference and many Feynman diagrams....