Low transverse momentum track reconstruction based on the Hough transform for the BESIII drift chamber
Low transverse momentum track reconstruction based on the Hough transform for the BESIII drift chamber
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DOI：
10.1007/s41605-018-0052-4
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发表时间：
2018-05
影响因子：
0.6
通讯作者：
Jin Zhang;Yao Zhang;Huai-min Liu;Ye Yuan;Xueyao Zhang;Liaoyuan Dong;Zhen Huang;X. Ji;
中科院分区：
文献类型：
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作者：
Jin Zhang;Yao Zhang;Huai-min Liu;Ye Yuan;Xueyao Zhang;Liaoyuan Dong;Zhen Huang;X. Ji;
背景多层漂移室（MDC）是BESIII的关键探测器之一，主要负责带电粒子的精确测量。宽动量范围的带电粒子的高重构效率是MDC重构软件的基本要求。目的是提高低横向动量区域的跟踪效率。方法霍夫变换是一种数学方法，可以将探测器中的命中映射到参数空间以全局查找轨迹。在本文中，我们将其用作开发新跟踪算法的基础，以在 MDC 中查找轨迹。此外，在实现霍夫变换时还考虑了命中的漂移距离。结果该跟踪算法在BESIII离线软件系统中实现，并通过蒙特卡罗和数据检验其性能。结果表明，该跟踪方法提高了低横向动量区域的重建效率。结论基于Hough变换的跟踪算法被证明有利于MDC低横向动量跟踪，并已用于BESIII离线数据重建。
BackgroundThe multilayer drift chamber (MDC) is one of the key detectors at the BESIII, which is mainly responsible for the precise measurement of charged particles. High reconstruction efficiency of charged particles with a wide range of momentums is a basic requirement for the MDC reconstruction software.PurposeThe purpose is to improve the tracking efficiency at the low transverse momentum region.MethodsThe Hough transform is a mathematical method that can map hits in a detector to parameter space to find tracks globally. In this paper, we have used it as the basis for developing a new tracking algorithm to find tracks in MDC. In addition, the drift distances of hits are considered when implementing Hough transform.ResultsThis tracking algorithm is implemented in the BESIII offline software system, and its performance is checked using both Monte Carlo and data. The results show that this tracking method improves reconstruction efficiency at the low transverse momentum region.ConclusionsThe tracking algorithm based on Hough transform is proved to be beneficial for the MDC low transverse momentum tracking, and has been used in BESIII offline data reconstruction