Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector
Study of certain angular correlations in the three-photon annihilations of the triplet state of positronium, the electron–positron bound state, may be used as a probe of potential CP and CPT-violating effects in the leptonic sector. We present the perspectives of CP and CPT tests using this process...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/12/8/1268 |
| _version_ | 1797560639444484096 |
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| author | Aleksander Gajos |
| author_facet | Aleksander Gajos |
| author_sort | Aleksander Gajos |
| collection | DOAJ |
| description | Study of certain angular correlations in the three-photon annihilations of the triplet state of positronium, the electron–positron bound state, may be used as a probe of potential CP and CPT-violating effects in the leptonic sector. We present the perspectives of CP and CPT tests using this process recorded with a novel detection system for photons in the positron annihilation energy range, the Jagiellonian Positron Emission Tomography (J-PET). We demonstrate the capability of this system to register three-photon annihilations with an unprecedented range of kinematical configurations and to measure the CPT-odd correlation between positronium spin and annihilation plane orientation with a precision improved by at least an order of magnitude with respect to present results. We also discuss the means to control and reduce detector asymmetries in order to allow J-PET to set the first measurement of the correlation between positronium spin and momentum of the most energetic annihilation photon which has never been studied to date. |
| first_indexed | 2024-03-10T18:03:27Z |
| format | Article |
| id | doaj.art-b26f3d803a754040a7a695c333ec3418 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-10T18:03:27Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-b26f3d803a754040a7a695c333ec34182023-11-20T08:44:50ZengMDPI AGSymmetry2073-89942020-08-01128126810.3390/sym12081268Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET DetectorAleksander Gajos0Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, S. Łojasiewicza 11, 30-348 Kraków, PolandStudy of certain angular correlations in the three-photon annihilations of the triplet state of positronium, the electron–positron bound state, may be used as a probe of potential CP and CPT-violating effects in the leptonic sector. We present the perspectives of CP and CPT tests using this process recorded with a novel detection system for photons in the positron annihilation energy range, the Jagiellonian Positron Emission Tomography (J-PET). We demonstrate the capability of this system to register three-photon annihilations with an unprecedented range of kinematical configurations and to measure the CPT-odd correlation between positronium spin and annihilation plane orientation with a precision improved by at least an order of magnitude with respect to present results. We also discuss the means to control and reduce detector asymmetries in order to allow J-PET to set the first measurement of the correlation between positronium spin and momentum of the most energetic annihilation photon which has never been studied to date.https://www.mdpi.com/2073-8994/12/8/1268discrete symmetryCPTpositronium |
| spellingShingle | Aleksander Gajos Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector Symmetry discrete symmetry CPT positronium |
| title | Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector |
| title_full | Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector |
| title_fullStr | Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector |
| title_full_unstemmed | Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector |
| title_short | Sensitivity of Discrete Symmetry Tests in the Positronium System with the J-PET Detector |
| title_sort | sensitivity of discrete symmetry tests in the positronium system with the j pet detector |
| topic | discrete symmetry CPT positronium |
| url | https://www.mdpi.com/2073-8994/12/8/1268 |
| work_keys_str_mv | AT aleksandergajos sensitivityofdiscretesymmetrytestsinthepositroniumsystemwiththejpetdetector |