LAUSR

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