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Applying the Kalman filter particle method to strange and open charm hadron reconstruction in the STAR experiment

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Abstract

We applied KF Particle, a Kalman Filter package for secondary vertex finding and fitting, to strange and open charm hadron reconstruction in heavy-ion collisions in the STAR experiment. Compared to the conventional helix swimming method used in STAR, the KF Particle method considerably improved the reconstructed \(\Lambda\), \(\Omega\), and \(D^0\) significance. In addition, the Monte Carlo simulation with STAR detector responses could adequately reproduce the topological variable distributions reconstructed in real data using the KF Particle method, thereby retaining substantial control of the reconstruction efficiency uncertainties for strange and open charm hadron measurements in heavy-ion collisions.

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Data availability

The data that support the findings of this study are openly available in Science Data Bank at https://www.doi.org/10.57760/sciencedb.j00186.00250 and https://cstr.cn/31253.11.sciencedb.j00186.00250.

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Acknowledgements

The authors thank the STAR Collaboration, RHIC Operations Group, RCF at BNL, and NERSC Center at LBNL for their support.

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Authors and Affiliations

  1. University of Science and Technology of China, Hefei, 230026, China

    Xin-Yue Ju & Yi-Fei Zhang

  2. Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA

    Xin-Yue Ju, Yue-Hang Leung, Sooraj Radhakrishnann & Xin Dong

  3. University of Heidelberg, 69120, Heidelberg, Germany

    Yue-Hang Leung

  4. Kent State University, Kent, OH, 44242, USA

    Sooraj Radhakrishnann & Spyridon Margetis

  5. Czech Technical University in Prague, Prague, Czech Republic

    Petr Chaloupka & Michal Kocan

  6. Brookhaven National Laboratory, Upton, NY, 11973, USA

    Yury Fisyak, Hong-Wei Ke & Ai-Hong Tang

  7. Nuclear Physics Institute of the Czech Academy of Sciences, Prague, Czech Republic

    Pavol Federic

  8. Goethe-Universität Frankfurt, Frankfurt am Main, Germany

    Ivan Kisel

  9. Frankfurt Institute for Advanced Studies, Frankfurt am Main, Germany

    Ivan Kisel

  10. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany

    Ivan Kisel, Iouri Vassiliev & Maksym Zyzak

  11. Tsinghua University, Beijing, 100084, China

    Xiang-Lei Zhu

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  1. Xin-Yue Ju
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Contributions

All authors contributed to the study conception and design. Material preparation, and analysis were performed by Xin-Yue Ju and Yue-Hang Leung. Data collection are performed by the RHIC-STAR collaboration and the Monte Carlo simulation thanks to Sooraj Radhakrishnann and Xiang-Lei Zhu. The first draft of the manuscript was written by Xin-Yue Ju,Yue-Hang Leung, Xin Dong and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Yi-Fei Zhang.

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Conflict of interest

The authors declare that they have no competing interests.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 11890712 and 12061141008) and the National Key R &D Program of China (Nos. 2018YFE0104700 and 2018YFE0205200). This work was supported in part by the Offices of NP and HEP within the U.S. DOE Office of Science; Yue-Hang Leung was partially supported by the GSI-Heidelberg cooperation contract.

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Ju, XY., Leung, YH., Radhakrishnann, S. et al. Applying the Kalman filter particle method to strange and open charm hadron reconstruction in the STAR experiment. NUCL SCI TECH 34, 158 (2023). https://doi.org/10.1007/s41365-023-01320-1

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