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# Positronium Decay into a Photon and Neutrinos Open Access

## Descriptions

Other title
Subject/Keyword

Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Pokraka, Andrzej
Supervisor and department
Andrzej Czarnecki (Physics)
Examining committee member and department
Don Page (Physics)
Joseph Maciejko (Physics)
Rodrigo Fernandez (Physics)
Department
Department of Physics
Specialization

Date accepted
2017-07-24T09:13:40Z
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
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 result. The low-energy tails of the spectra are shown to be sensitive to binding effects in positronium and agree with Low's theorem. Additionally, we find a connection between the behaviour of the soft photon spectrum in both $\text{o-Ps} \to \gamma \nu_\ell \bar\nu_\ell$ and $\text{o-Ps} \to 3\gamma$ decays, and the Stark effect.
Language
English
DOI
doi:10.7939/R3VQ2SQ5Z
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication
Andrzej Pokraka and Andrzej Czarnecki, Positronium decay into a photon and neutrinos'', Phys. Rev. D 94, 113012 (2016)

## File Details

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2017-07-24T15:13:41.382+00:00
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