Potential of the J-PET Detector for Studies of Discrete Symmetries in Decays of Positronium Atom — A Purely Leptonic System

Autor(en)

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

Abstrakt

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(en)

Teilchenphysik

Externe Organisation(en)

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

Band

47

Seiten

509-535

Anzahl der Seiten

27

ISSN

0587-4254

DOI

https://doi.org/10.5506/APhysPolB.47.509

Publikationsdatum

02-2016

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik, 103034 Teilchenphysik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/2767c94f-193b-415b-a04f-ee6eeda89658