Trilateration-based reconstruction of ortho-positronium decays into three photons with the J-PET detector
| Autor: | Gajos, A., Kamińska, D., Czerwiński, E., Alfs, D., Bednarski, T., Białas, P., Głowacz, B., Gorgol, M., Jasińska, B., Kapłon, Ł., Korcyl, G., Kowalski, P., Kozik, T., Krzemień, W., Kubicz, E., Mohammed, M., Niedźwiecki, Sz., Pałka, M., Pawlik-Niedźwiecka, M., Raczyński, L., Rudy, Z., Rundel, O., Sharma, N. G., Silarski, M., Słomski, A., Strzelecki, A., Wieczorek, A., Wiślicki, W., Zgardzińska, B., Zieliński, M., Moskal, P. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.nima.2016.02.069 |
| Popis: | This work reports on a new reconstruction algorithm allowing to reconstruct the decays of ortho-positronium atoms into three photons using the places and times of photons recorded in the detector. The method is based on trilateration and allows for a simultaneous reconstruction of both location and time of the decay. Results of resolution tests of the new reconstruction in the J-PET detector based on Monte Carlo simulations are presented, which yield a spatial resolution at the level of 2 cm (FWHM) for X and Y and at the level of 1 cm (FWHM) for Z available with the present resolution of J-PET after application of a kinematic fit. Prospects of employment of this method for studying angular correlations of photons in decays of polarized ortho-positronia for the needs of tests of CP and CPT discrete symmetries are also discussed. The new reconstruction method allows for discrimination of background from random three-photon coincidences as well as for application of a novel method for determination of the linear polarization of ortho-positronium atoms, which is also introduced in this work. Comment: 18 pages, 5 figures. Accepted for publication in Nuclear Instrumentation and Methods in Physics Research A |
| Databáze: | arXiv |
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