Abstract
The Jagiellonian Positron Emission Tomograph (J-PET) is a novel device based on organic scintillators being developed at Jagiellonian University in Kraków, Poland. J-PET is an axially symmetric and high acceptance scanner that can be used as a multi-purpose detector system. It is well suited to pursue tests of discrete symmetries in decays of positronium in addition to medical imaging. J-PET enables measurement of both momenta and polarization vectors of annihilation photons. The latter is a unique feature of the J-PET detector which allows study of the time reversal symmetry violation operator constructed solely from the annihilation photons momenta before and after scattering within the detector.
Highlights
Time reversal symmetry violation has not been observed in purely leptonic systems so far
In this article we propose the test of fundamental discrete symmetry violation in a purely leptonic system via operators involving polarization vectors of the annihilation photons, as proposed in Ref [8]
Positron emission tomography (PET) is a non-invasive technique used in the diagnostics of various types of tumors at the cellular level
Summary
Time reversal symmetry violation has not been observed in purely leptonic systems so far. The best experimental upper limits for CP and CPT (C-Charge Conjugation, P-Parity and T-Time) symmetries violation in positronium decay are set to about 0.3×10-3 [1,2,3]. In this article we propose the test of fundamental discrete symmetry violation in a purely leptonic system via operators involving polarization vectors of the annihilation photons, as proposed in Ref [8]
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