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    ICRC 2025 - The Astroparticle Physics Conference

    14–24 Jul 2025
    CICG - International Conference Centre - Geneva, Switzerland
    Europe/Zurich timezone

    Contact

    Study on large zenith angle air showers with LHAASO-KM2A

    16 Jul 2025, 17:20
    15m
    Room C

    Room C
    Talk Cosmic-Ray Indirect CRI

    Speaker

    Dr Quan-Bu Gou (Tianfu Cosmic Ray Research Center & Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences)

    Description

    At large zenith angles, the electromagnetic component of ordinary air showers is significantly attenuated by the atmosphere long before reaching ground level. The observation of Horizontal Air Showers (HAS) provides a "well-shielded laboratory" for detecting penetrating particles, such as high-energy muons and cosmic neutrinos, which leave a distinctive signature in this environment.
    In this presentation, typical events recorded by LHAASO-KM2A at large zenith angles will be presented, along with the phenomenology of horizontal air showers as measured by LHAASO-KM2A. Additionally, the constraints of the neutrino flux associated with GRB 221009A and other
    gamma-ray bursts detected by gamma-ray telescopes in 2022 and located in the observation window will also be addressed.

    Collaboration(s) The LHAASO collaboration

    Author

    Dr Quan-Bu Gou (Tianfu Cosmic Ray Research Center & Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences)

    Co-authors

    Dr Zihan Yang (Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University) Dr Xishui Tian (Department of Astronomy, School of Physics, Peking University) Dr Qinyuan Zhang (Department of Astronomy, School of Physics, Peking University) Mr Lifeng Chen (Hebei Normal University) Mr Quan Zhang (Center for Relativistic Astrophysics and High Energy Physics, School of Physics and Materials Science & Institute of Space Science and Technology, Nanchang University) Prof. Zhuo Li (Department of Astronomy, School of Physics, Peking University) Dr Di Sciascio Giuseppe (INFN - Roma Tor Vergata) Dr Sujie Lin (School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and 64 Technology (Zhuhai), Sun Yat-sen University) Dr Mingming Kang (College of Physics, Sichuan University) Prof. Shuwang Cui (Hebei Normal University) Qingwen Tang (Center for Relativistic Astrophysics and High Energy Physics, School of Physics and Materials Science & Institute of Space Science and Technology, Nanchang University) Hao Zhou (Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University)

    Presentation materials

    Quanbu ICRC2025.pdf