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1Simulation study of BESⅢwith stitched CMOS pixel detector using AcTs显示文摘The reconstruction of the tracks of charged particles with high precision is crucial for HEP experiments to achieve their physics goals.The BESⅢdrift chamber,which is used as the tracking detector of the BESⅢexperiment,has suffered from aging effects resulting in degraded tracking performance after operation for approximately 15 years.To preserve and enhance the tracking performance of BESⅢ,one of the proposals is to add one layer of a thin cylindrical CMOS pixel sensor based on state-of-the-art stitching technology between the beam pipe and the drift chamber.The improvement in the tracking performance of BESⅢwith such an additional pixel detector compared to that with only the existing drift chamber was studied using the modern common tracking software Acts,which provides a set of detector-agnostic and highly performant tracking algorithms that have demonstrated promising performance for a few high-energy physics and nuclear physics experiments.Yi Liu Xiao‑Cong Ai Guang‑Yan Xiao Ya‑Xuan Li Ling‑Hui Wu Liang‑Liang Wang Jia‑Ning Dong Ming‑Yi Dong Qing‑Lin Geng Min Luo Yan Niu An‑Qing Wang Chen‑Xu Wang Meng Wang Lei Zhang Liang Zhang Rui‑Kai Zhang Yao Zhang Ming‑Gang Zhao Yang Zhou 2023Nuclear Science and Techniques2023,34,12:0
2Improvement of main drift chamber Monte-Carlo tuning model at BESⅢ显示文摘Based on real data,a new parameterized model of the main drift chamber response is proposed.In this model,we tune the ratio of good hits and the residual distribution separately.By data quality checking,the diference between simulation and data in track reconstruction efciency reduces from 1%to 0.5%averagely for the pion in J/ψ→π+ππ0,and the momentum resolution agreement improves significantly for the proton in J/ψ→ppˉ.张瑞 肖栋 安芬芬 高原宁 何康林 季晓斌 金山 李卫东 李卫国 刘怀民 刘凯 沈肖雁 王贻芳 伍灵慧 徐庆年 袁野 张瑶 赵光 郑阳恒 2014Chinese Physics C2014,38,2:0
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