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<p>The main physics motivation of the Circular Electron-Positron Collider (CEPC) is to serve as a high‑luminosity Higgs factory that enables extremely precise Higgs and electroweak measurements while providing strong sensitivity to new physics.</p><p><b>Purpose</b> The goal of this work is to design and implement an ACTS(A Common Tracking Software)-based track-reconstruction chain for the CEPC Reference Detector, fully integrated within the Gaudi framework, and to evaluate its performance.</p><p><b>Methods</b> The reconstruction chain combines the modular architecture of ACTS with Gaudi’s flexible configuration and event‑processing model. It incorporates detailed detector geometry, non‑uniform magnetic‑field handling, and material‑aware propagation to enable high‑precision charged‑particle tracking. Performance is evaluated using simulated CEPC events.</p><p><b>Results</b> The system achieves high tracking efficiency, good parameter resolution, and stable performance across the full detector acceptance. Computational performance is competitive, and the thread‑safe design of ACTS scales efficiently on modern multi‑core architectures. These results demonstrate that the ACTS‑based approach can well meet the expected physics and computing requirements of CEPC.</p><p><b>Conclusion</b> This development provides a robust baseline for future reconstruction studies and a flexible platform for continued algorithmic improvements. As the CEPC detector and software evolve, the ACTS‑based reconstruction chain will remain a key component for delivering high‑quality tracking performance in support of the experiment’s physics program.</p>

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Acts-based track reconstruction for the CEPC reference detector

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Yizhou Zhang,
  • Weidong Li,
  • Xiaocong Ai,
  • Tao Lin

摘要

The main physics motivation of the Circular Electron-Positron Collider (CEPC) is to serve as a high‑luminosity Higgs factory that enables extremely precise Higgs and electroweak measurements while providing strong sensitivity to new physics.

Purpose The goal of this work is to design and implement an ACTS(A Common Tracking Software)-based track-reconstruction chain for the CEPC Reference Detector, fully integrated within the Gaudi framework, and to evaluate its performance.

Methods The reconstruction chain combines the modular architecture of ACTS with Gaudi’s flexible configuration and event‑processing model. It incorporates detailed detector geometry, non‑uniform magnetic‑field handling, and material‑aware propagation to enable high‑precision charged‑particle tracking. Performance is evaluated using simulated CEPC events.

Results The system achieves high tracking efficiency, good parameter resolution, and stable performance across the full detector acceptance. Computational performance is competitive, and the thread‑safe design of ACTS scales efficiently on modern multi‑core architectures. These results demonstrate that the ACTS‑based approach can well meet the expected physics and computing requirements of CEPC.

Conclusion This development provides a robust baseline for future reconstruction studies and a flexible platform for continued algorithmic improvements. As the CEPC detector and software evolve, the ACTS‑based reconstruction chain will remain a key component for delivering high‑quality tracking performance in support of the experiment’s physics program.