14–24 Jul 2025
CICG - International Conference Centre - Geneva, Switzerland
Europe/Zurich timezone
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The anisotropy of cosmic ray light and heavy components observed by LHAASO-KM2A

15 Jul 2025, 15:35
15m
CICG - International Conference Centre - Geneva, Switzerland

CICG - International Conference Centre - Geneva, Switzerland

17 rue de Varembé CH - 1211 Geneva Switzerland
Talk Cosmic-Ray Indirect CRI

Speaker

Prof. Huihai He (Institute of High Energy Physics, CAS)

Description

The anisotropy in different mass components of cosmic rays can provide stringent constraints on theoretical models regarding the origin of anisotropy, such as the distribution of sources, the propagation of cosmic rays, and the local magnetic field environment. This is particularly significant in the high-energy range, from hundreds of TeV to PeV, where the anisotropy exhibits considerable variation. However, to date, the cosmic-ray anisotropy of different mass compositions in this high energy range are not reported. The muon measurements from the LHAASO-KM2A offer an opportunity to identify the components of cosmic rays. In this study, we utilize three years of data from KM2A to measure the anisotropies of different mass composition ratios across tens of TeV to PeV range. We obtained high-purity samples of light and heavy component cosmic rays, and our findings indicate that the anisotropies show variations for lighter components at lower energies.

Collaboration(s) LHAASO

Authors

Weiyan Zhang (Hebei Normal University) Wei Gao (IHEP,CAS)

Co-authors

Shuwang Cui (HEBEI NORMAL UNIVERSITY) Prof. Huihai He (Institute of High Energy Physics, CAS) Hongkui Lv Hengying Zhang (Yunnan University)

Presentation materials

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