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. 2024 Jan 2;15:78. doi: 10.1038/s41467-023-44340-6

Fig. 3. Summary of searches for CP-odd ortho-Positronium decays.

Fig. 3

The two upper results18,53 are performed for the operator correlation O1 defined in Eq. (1), whereas J-PET is using the new correlation O2 constructed with the polarization vector in Eq. (3). The blue vertical line indicates no CP symmetry violation, while the green bars for each measurement correspond to the total uncertainty calculated as statistical and systematic uncertainties combined in quadrature.