Cygno光学TPC中基于贝叶斯网络的3D事件重建用于暗物质直接探测
仪器与探测器
2025-11-13 v2 天体物理仪器与方法
高能物理 - 实验
数据分析、统计与概率
摘要
CYGNO实验正在开发一种具有光学读出的高分辨率气态时间投影室（TPC），用于定向暗物质搜索。该探测器使用氦-四氟化甲烷（He:CF₄ 60:40）混合气体，在大气压下工作，并采用三级气体电子倍增器（GEM）放大级，结合科学相机进行高分辨率二维成像，以及快速光电倍增管用于时间分辨闪烁光探测。该设置实现了3D事件重建：光电倍增管信号提供深度信息，而相机提供高精度横向分辨率。在本工作中，我们提出了一种基于贝叶斯网络的算法，旨在仅使用光电倍增管信号进行事件重建，从而获得粒子轨迹的完整3D描述。该算法以概率方式建模光收集过程，并在光发射的气体电子倍增器平面上估计空间参数和强度参数。该算法实现在贝叶斯分析工具包中，并使用马尔可夫链蒙特卡洛采样进行后验推断。利用CYGNO LIME原型数据的验证显示了对局域和扩展轨迹的准确重建。结果表明，贝叶斯方法能够实现稳健的3D描述，当与相机数据结合时，进一步提高了轨迹重建的精度。该方法学代表了定向暗物质探测的重要进展，提升了以高空间分辨率识别核反冲轨迹的能力。
引用
@article{arxiv.2506.04973,
title = {Bayesian network 3D event reconstruction in the Cygno optical TPC for dark matter direct detection},
author = {Fernando Domingues Amaro and Rita Antonietti and Elisabetta Baracchini and Luigi Benussi and Stefano Bianco and Francesco Borra and Cesidio Capoccia and Michele Caponero and Gianluca Cavoto and Igor Abritta Costa and Antonio Croce and Emiliano Dané and Melba D'Astolfo and Giorgio Dho and Flaminia Di Giambattista and Emanuele Di Marco and Giulia D'Imperio and Matteo Folcarelli and Joaquim Marques Ferreira dos Santos and Davide Fiorina and Francesco Iacoangeli and Zahoor Ul Islam and Herman Pessoa Lima Júnior and Ernesto Kemp and Giovanni Maccarrone and Rui Daniel Passos Mano and David José Gaspar Marques and Luan Gomes Mattosinhos de Carvalhoand Giovanni Mazzitelli and Alasdair Gregor McLean and Pietro Meloni and Andrea Messina and Cristina Maria Bernardes Monteiro and Rafael Antunes Nobrega and Igor Fonseca Pains and Emiliano Paoletti and Luciano Passamonti and Fabrizio Petrucci and Stefano Piacentini and Davide Piccolo and Daniele Pierluigi and Davide Pinci and Atul Prajapati and Francesco Renga and Rita Joana Cruz Roque and Filippo Rosatelli and Alessandro Russo and Giovanna Saviano and Pedro Alberto Oliveira Costa Silva and Neil John Curwen Spooner and Roberto Tesauro and Sandro Tomassini and Samuele Torelli and Donatella Tozzi},
journal= {arXiv preprint arXiv:2506.04973},
year = {2025}
}