Topological background discrimination in the PandaX-III neutrinoless double beta decay experiment
| Autor: | Galan, J, Chen, X, Du, H, Fu, C, Giboni, K, Giuliani, F, Han, K, Jiang, B, Ji, X, Lin, H, Lin, Y, Liu, J, Ni, K, Ren, X, Wang, S, Wu, S, Xie, C, Yang, Y, Zhang, D, Zhang, T, Zhao, L, Aune, S, Bedfer, Y, Berthoumieux, E, Calvet, D, d'Hose, N, Ferrer-Ribas, E, Kunne, F, Manier, B, Neyret, D, Papaevangelou, T, Chen, L, Hu, S, Jian, S, Li, P, Li, X, Zhang, H, Zhao, M, Zhou, J, Mao, Y, Qiao, H, Yuan, Y, Wang, M, Chen, Y, Khan, A N, Raper, N, Tang, J, Wang, W, Feng, C, Li, C, Liu, S, Wang, X, Zhu, D, Castel, J F, Cebrián, S, Dafni, T, Irastorza, I G, Luzón, G, Mirallas, H, Sun, X, Tan, A, Haxton, W, Mei, Y, Kobdaj, C, Yan, Y |
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| Přispěvatelé: | Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Physics - Instrumentation and Detectors Physics::Instrumentation and Detectors FOS: Physical sciences Electron Topology 01 natural sciences programming High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) double-beta decay: (0neutrino) Double beta decay 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] 010306 general physics Physics Time projection chamber 010308 nuclear & particles physics track data analysis background Detector Instrumentation and Detectors (physics.ins-det) time projection chamber Orders of magnitude (time) xenon: nuclide Event (particle physics) Electron scattering Energy (signal processing) |
| Zdroj: | J.Phys.G J.Phys.G, 2020, 47 (4), pp.045108. ⟨10.1088/1361-6471/ab4dbe⟩ |
| DOI: | 10.1088/1361-6471/ab4dbe⟩ |
| Popis: | The PandaX-III experiment plans to search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^{136}$Xe in the China JinPing underground Laboratory (CJPL). The experiment will use a high pressure gaseous Time Projection Chamber (TPC) to register both the energy and the electron track topology of an event. This article is devoted to the software side of the experiment. As software tool we use REST, a framework developed for the reconstruction and simulation of TPC-based detector systems. We study the potential for background reduction by introducing appropiate parameters based on the properties of 0$\nu\beta\beta$ events. We exploit for the first time not only the energy density of the electron track-ends, but also the electron scattering angles produced by an electron near the end of its trajectory. To implement this, we have added new algorithms for detector signal and track processing inside REST. Their assessment shows that background can be reduced by about 7 orders of magnitude while keeping 0$\nu\beta\beta$ efficiency above 20% for the PandaX-III baseline readout scheme, a 2-dimensional 3mm-pitch stripped readout. More generally, we use the potential of REST to handle 2D/3D data to assess the impact on signal-to-background significance at different detector granularities, and to validate the PandaX-III baseline choice. Finally, we demonstrate the potential to discriminate surface background events generated at the readout plane in the absence of $t_o$, by making use of event parameters related with the diffusion of electrons. Comment: 40 pages, 15 figures. Prepared for submission to Journal of Physics G |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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