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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.13582 |
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| _version_ | 1866915829443985408 |
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| author | Liang, Tianyu Wang, Hulin Zhang, Dongliang Gao, Chaosong Sun, Xiangming Liu, Feng Liu, Jun Lu, Chengui Yang, Yichen Zhao, Chengxin Qiu, Hao Chen, Kai |
| author_facet | Liang, Tianyu Wang, Hulin Zhang, Dongliang Gao, Chaosong Sun, Xiangming Liu, Feng Liu, Jun Lu, Chengui Yang, Yichen Zhao, Chengxin Qiu, Hao Chen, Kai |
| contents | N$ν$DEx aims to search for the neutrinoless double beta decay in $^{82}$Se using a high pressure $^{82}$SeF$_6$ gas time projection chamber (TPC). This paper presents a simulation and analysis framework developed specifically for the N$ν$DEx experiment.
Using density functional theory and two-temperature theory, the reduced mobilities of SeF$_5^-$ and SeF$_6^-$ ions in SeF$_6$ were calculated, yielding values of 0.444 and 0.430 $\mathrm{cm^2V^{-1}s^{-1}}$ respectively, with an estimated uncertainty within 3\%.
The TPC geometry, featuring a cathode, focusing plane, and anode structure, was modeled in COMSOL to compute electric fields. Signal and background events were generated using BxDecay0 and Geant4, while Garfield++ was employed to simulate charge transport and signal induction. Three-dimensional tracks were reconstructed from drift-time differences between the two assumed ion species using a breadth-first search algorithm.
To demonstrate the framework's analytical capability, topological variables were taken from reconstructed tracks and used to define selection criteria. A boosted decision tree was then implemented to benchmark the signal-background separation. This simulation framework successfully validates the complete experimental workflow, serving as a robust tool for detector design and future sensitivity studies in the N$ν$DEx experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_13582 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Development of a simulation and analysis framework for NνDEx experiment Liang, Tianyu Wang, Hulin Zhang, Dongliang Gao, Chaosong Sun, Xiangming Liu, Feng Liu, Jun Lu, Chengui Yang, Yichen Zhao, Chengxin Qiu, Hao Chen, Kai Instrumentation and Detectors High Energy Physics - Experiment N$ν$DEx aims to search for the neutrinoless double beta decay in $^{82}$Se using a high pressure $^{82}$SeF$_6$ gas time projection chamber (TPC). This paper presents a simulation and analysis framework developed specifically for the N$ν$DEx experiment. Using density functional theory and two-temperature theory, the reduced mobilities of SeF$_5^-$ and SeF$_6^-$ ions in SeF$_6$ were calculated, yielding values of 0.444 and 0.430 $\mathrm{cm^2V^{-1}s^{-1}}$ respectively, with an estimated uncertainty within 3\%. The TPC geometry, featuring a cathode, focusing plane, and anode structure, was modeled in COMSOL to compute electric fields. Signal and background events were generated using BxDecay0 and Geant4, while Garfield++ was employed to simulate charge transport and signal induction. Three-dimensional tracks were reconstructed from drift-time differences between the two assumed ion species using a breadth-first search algorithm. To demonstrate the framework's analytical capability, topological variables were taken from reconstructed tracks and used to define selection criteria. A boosted decision tree was then implemented to benchmark the signal-background separation. This simulation framework successfully validates the complete experimental workflow, serving as a robust tool for detector design and future sensitivity studies in the N$ν$DEx experiment. |
| title | Development of a simulation and analysis framework for NνDEx experiment |
| topic | Instrumentation and Detectors High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2508.13582 |