Speaker: Paweł Moskal   (UJ)

Title: “Test of discrete symmetries in positronium decays using J-PET tomograph”

Abstract:
The first PET tomograph based on plastic scintillators was designed and built at the Institute of Physics of the Jagiellonian University. Jagiellonian PET (J-PET) is optimized for the detection of photons originating from positron-electron annihilation. It is a unique research device that allows studying decays of positronium in the whole available phase space. Moreover, it enables the determination of not only the momentum vectors of photons but it is also capable of determining photons’ polarization and imaging the annihilation places. Access to the photons’ polarization allows exploring a new class of discrete symmetry odd operators that were not investigated before. It enables also us to study the quantum entanglement of high-energy photons originating from the decay of positronium. The presentation will include the description of the methods, results, and research plans for discrete symmetries tests in the decays of positronium – the purely leptonic system built from charged leptons.
P. Moskal et al., Nature Reviews Physics 1 (2019) 527.
J-PET: P. Moskal et al., Nature Communication 12 (2021) 5658.
J-PET: P. Moskal et al., Science Advances 7 (2021) eabh4394.