The particle identification of charged hadrons, especially for the separation of K and π, is crucial for the flavour physics study. Ionization measurement with the cluster counting technique, which has much less fluctuation than traditional dE/dx measurement, is expected to provide better particle identification for the BESIII experiment. Simulation studies, including a Garfield++ based waveform analysis and a performance study of K/\pi identification in the BESIII, offline software system have been performed. The results show that K/π separation power and PID efficiency would be improved significantly in the momentum range above 1.2 GeV/c using cluster counting technique even with conservative resolution assumption.
@article{arxiv.2210.01845,
title = {Simulation study of particle identification using cluster counting technique for the BESIII drift chamber},
author = {Shuiting Xin and Guang Zhao and Linghui Wu and Mingyi Dong and Gang Li and Shengsen Sun and Xinchou Lou},
journal= {arXiv preprint arXiv:2210.01845},
year = {2023}
}