Nature Communications (Jan 2024)
Discrete symmetries tested at 10−4 precision using linear polarization of photons from positronium annihilations
- Paweł Moskal,
- Eryk Czerwiński,
- Juhi Raj,
- Steven D. Bass,
- Ermias Y. Beyene,
- Neha Chug,
- Aurélien Coussat,
- Catalina Curceanu,
- Meysam Dadgar,
- Manish Das,
- Kamil Dulski,
- Aleksander Gajos,
- Marek Gorgol,
- Beatrix C. Hiesmayr,
- Bożena Jasińska,
- Krzysztof Kacprzak,
- Tevfik Kaplanoglu,
- Łukasz Kapłon,
- Konrad Klimaszewski,
- Paweł Konieczka,
- Grzegorz Korcyl,
- Tomasz Kozik,
- Wojciech Krzemień,
- Deepak Kumar,
- Simbarashe Moyo,
- Wiktor Mryka,
- Szymon Niedźwiecki,
- Szymon Parzych,
- Elena Pérez del Río,
- Lech Raczyński,
- Sushil Sharma,
- Shivani Choudhary,
- Roman Y. Shopa,
- Michał Silarski,
- Magdalena Skurzok,
- Ewa Ł. Stępień,
- Pooja Tanty,
- Faranak Tayefi Ardebili,
- Keyvan Tayefi Ardebili,
- Kavya Valsan Eliyan,
- Wojciech Wiślicki
Affiliations
- Paweł Moskal
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Eryk Czerwiński
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Juhi Raj
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Steven D. Bass
- Centre for Theranostics, Jagiellonian University
- Ermias Y. Beyene
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Neha Chug
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Aurélien Coussat
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Catalina Curceanu
- INFN, Laboratori Nazionali di Frascati
- Meysam Dadgar
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Manish Das
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Kamil Dulski
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Aleksander Gajos
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Marek Gorgol
- Institute of Physics, Maria Curie-Skłodowska University
- Beatrix C. Hiesmayr
- Faculty of Physics, University of Vienna
- Bożena Jasińska
- Institute of Physics, Maria Curie-Skłodowska University
- Krzysztof Kacprzak
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Tevfik Kaplanoglu
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Łukasz Kapłon
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Konrad Klimaszewski
- Department of Complex Systems, National Centre for Nuclear Research
- Paweł Konieczka
- Department of Complex Systems, National Centre for Nuclear Research
- Grzegorz Korcyl
- Centre for Theranostics, Jagiellonian University
- Tomasz Kozik
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Wojciech Krzemień
- High Energy Physics Division, National Centre for Nuclear Research
- Deepak Kumar
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Simbarashe Moyo
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Wiktor Mryka
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Szymon Niedźwiecki
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Szymon Parzych
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Elena Pérez del Río
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Lech Raczyński
- Department of Complex Systems, National Centre for Nuclear Research
- Sushil Sharma
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Shivani Choudhary
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Roman Y. Shopa
- Department of Complex Systems, National Centre for Nuclear Research
- Michał Silarski
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Magdalena Skurzok
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Ewa Ł. Stępień
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Pooja Tanty
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Faranak Tayefi Ardebili
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Keyvan Tayefi Ardebili
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Kavya Valsan Eliyan
- Marian Smoluchowski Institute of Physics, Jagiellonian University
- Wojciech Wiślicki
- Department of Complex Systems, National Centre for Nuclear Research
- DOI
- https://doi.org/10.1038/s41467-023-44340-6
- Journal volume & issue
-
Vol. 15,
no. 1
pp. 1 – 10
Abstract
Abstract Discrete symmetries play an important role in particle physics with violation of CP connected to the matter-antimatter imbalance in the Universe. We report the most precise test of P, T and CP invariance in decays of ortho-positronium, performed with methodology involving polarization of photons from these decays. Positronium, the simplest bound state of an electron and positron, is of recent interest with discrepancies reported between measured hyperfine energy structure and theory at the level of 10−4 signaling a need for better understanding of the positronium system at this level. We test discrete symmetries using photon polarizations determined via Compton scattering in the dedicated J-PET tomograph on an event-by-event basis and without the need to control the spin of the positronium with an external magnetic field, in contrast to previous experiments. Our result is consistent with QED expectations at the level of 0.0007 and one standard deviation.
