Potential of the J-PET Detector for Studies of Discrete Symmetries in Decays of Positronium Atom — A Purely Leptonic System
- Author(s)
- P. Moskal, D. Alfs, T. Bednarski, P. Bialas, E. Czerwinski, C. Curceanu, A. Gajos, B. Glowacz, M. Gorgol, B. C. Hiesmayr, B. Jasinska, D. Kaminska, G. Korcyl, P. Kowalski, T. Kozik, W. Krzemien, N. Krawczyk, E. Kubicz, M. Mohammed, Sz. Niedzwiecki, M. Pawlik-Niedzwiecka, L. Raczynski, Z. Rudy, M. Silarski, A. Wieczorek, W. Wislicki, M. Zielinski
- Abstract
The Jagiellonian Positron Emission Tomograph (J-PET) was constructed as a prototype of the cost-effective scanner for the simultaneous metabolic imaging of the whole human body. Being optimized for the detection of photons from the electron-positron annihilation with high time and high angular-resolution, it constitutes a multi-purpose detector providing new opportunities for studying the decays of positronium atoms. Positronium is the lightest purely leptonic object decaying into photons. As an atom bound by a central potential, it is a parity eigenstate, and as an atom built out of an electron and an anti-electron, it is an eigenstate of the charge conjugation operator. Therefore, the positronium is a unique laboratory to study discrete symmetries whose precision is limited, in principle, by the effects due to the weak interactions expected at the level of (similar to 10(14)) and photon-photon interactions expected at the level of (similar to 10(9)). The J-PET detector enables to perform tests of discrete symmetries in the leptonic sector via the determination of the expectation values of the discrete-symmetries-odd operators, which may be constructed from the spin of ortho-positronium atom and the momenta and polarization vectors of photons originating from its annihilation. In this article, we present the potential of the J-PET detector to test the C, CP, T and CPT symmetries in the decays of positronium atoms.
- Organisation(s)
- Particle Physics
- External organisation(s)
- Jagiellonian University in Krakow, Istituto Nazionale di Fisica Nucleare (INFN), Roma, Marie Curie-Sklodowska University, National Centre for Nuclear Research (NCBJ), Polish Academy of Sciences (PAS)
- Journal
- Acta Physica Polonica B
- Volume
- 47
- Pages
- 509-535
- No. of pages
- 27
- ISSN
- 0587-4254
- DOI
- https://doi.org/10.5506/APhysPolB.47.509
- Publication date
- 02-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103014 Nuclear physics, 103034 Particle physics
- Keywords
- ASJC Scopus subject areas
- Physics and Astronomy(all)
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/potential-of-the-jpet-detector-for-studies-of-discrete-symmetries-in-decays-of-positronium-atom--a-purely-leptonic-system(2767c94f-193b-415b-a04f-ee6eeda89658).html