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Studies of nuclear equation of state with the HIRFL-CSR external-target experiment

  • Regular Article - Experimental Physics
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Abstract

The Heavy Ion Research Facility in Lanzhou-Cooling Storage Ring (HIRFL-CSR) external-target experiment (CEE) under construction is expected to provide novel opportunities for the studies of the thermodynamic properties of nuclear matter, in particular the nuclear matter equation of state (nEOS), with heavy ion collisions at a few hundreds MeV/u beam energies. Based on Geant 4 packages, the simulations of the detector responses to the collision events generated using transport model are conducted. The overall performance of CEE, including the geometric coverage, the momentum resolution of tracks and the particle identification ability has been investigated. Various observables proposed to probe the nEOS, such as the production of light clusters, \({}^3\textrm{H}/^3\textrm{He}\) yield ratio, radial flow, \(\pi ^{-}/\pi ^{+}\) yield ratio and neutral kaon yields, have been reconstructed. The feasibility of studying nEOS beyond the saturation density via the aforementioned observables to be measured with CEE has been demonstrated by using the ultra relativistic quantum molecular dynamics (UrQMD) simulation data.

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Data Availability Statement

This manuscript has associated data in a data repository. [Authors’ comment: The data that support the findings of this study are available from the corresponding author upon reasonable request.]

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Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grant Nos. 11927901 and 11890712, and by Tsinghua University Scientific Research Program.

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Authors and Affiliations

  1. Department of Physics, Tsinghua University, Beijing, 100084, China

    Dong Guo, Zhi Qin, Kun Zheng & Zhigang Xiao

  2. Institute of Modern Physics, Chinese Academy of Science, Lanzhou, 730000, China

    Xionghong He, Chenlu Hu, Yapeng Zhang, Xianglun Wei, Herun Yang, Limin Duan, Yuhong Yu, Zhiyu Sun & Qingfeng Li

  3. School of Science, Huzhou University, Huzhou, 313000, China

    Pengcheng Li, Yongjia Wang & Qingfeng Li

  4. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China

    Botan Wang

  5. Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China

    Yingjie Zhou, Dongdong Hu & Ming Shao

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  1. Dong Guo
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Communicated by Carlos Munoz Camacho.

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Guo, D., He, X., Li, P. et al. Studies of nuclear equation of state with the HIRFL-CSR external-target experiment. Eur. Phys. J. A 60, 36 (2024). https://doi.org/10.1140/epja/s10050-024-01245-2

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