Speaker
Description
Abstract: LHAASO has achieved high-precision cosmic-ray measurements with excellent angular resolution, (10%)–(15%) energy resolution, nearly composition-independent energy reconstruction, and strong particle-identification capability. Benefiting from its large acceptance and high statistics, LHAASO has enabled a series of breakthrough results in astroparticle physics. In cosmic-ray studies, LHAASO has measured the energy spectra of individual species, especially protons and helium nuclei, with high-purity samples and a precision comparable to that of direct space-borne experiments. These measurements extend the continuous coverage of the cosmic-ray spectrum from (10,\mathrm{GeV}) to (10,\mathrm{PeV}) and reveal unexpected spectral structures, including proton hardening around (0.1,\mathrm{PeV}), a proton knee at (3.3,\mathrm{PeV}), continuous helium softening above (0.1,\mathrm{PeV}), and a weak hardening before the helium knee near (7,\mathrm{PeV}). Furthermore, LHAASO’s precise all-particle spectrum measurement, with well-controlled systematic uncertainties, reveals intrinsic spectral features and the correlation between mass composition and spectral structures. These results provide a global picture of Galactic cosmic rays over six orders of magnitude, offering important clues to their origin and acceleration mechanisms.
| 请选择分会 | 中微子物理、粒子天体物理与宇宙学 |
|---|
