QED and Fundamental Symmetries in Positronium Decays

Abstract

We discuss positronium decays with emphasis on tests of fundamental symmetries and the constraints from measurements of other precision observables involving electrons and photons.

15 pages, to appear in Acta Physica Polonica B, based on a lecture presented at the 3rd Symposium on Positron Emission Tomography, Cracow, September 10-13 2018

References in corpus (8)

• Measurement of the fine-structure constant as a test of the Standard Model
• New determination of the fine structure constant and test of the quantum electrodynamics
• An Improved Limit on Invisible Decays of Positronium
• A novel method for the line-of-response and time-of-flight reconstruction in TOF-PET detectors based on a library of synchronized model signals
• A feasibility study of ortho-positronium decays measurement with the J-PET scanner based on plastic scintillators
• First test of $O({\alpha }^2)$ correction of the orthopositronium decay rate
• Orthopositronium lifetime: analytic results in O(alpha) and O(alpha^3 ln(alpha))
• Parapositronium can decay into three photons

Cited by in corpus (8)

• Testing CPT symmetry in ortho-positronium decays with positronium annihilation tomography
• Positronium Physics and Biomedical Applications
• Discrete symmetries tested at 10${}^{-4}$ precision using linear polarization of photons from positronium annihilations
• Photoproduction of relativistic QED bound states in hadronic collisions
• J-PET detection modules based on plastic scintillators for performing studies with positron and positronium beams
• Quantum Entanglement Degree, Mean Positronium Lifetime, and the $3\gamma$/$2\gamma$ Annihilation-Rate Ratio as Novel PET Biomarkers for Hypoxia -- Concept, Challenges, and Predictions
• Annihilation energy and decay time of an ortho-Positronium
• Two-loop master integrals for pseudo-scalar quarkonium and leptonium production and decay