Speaker
Dr
Zhang Shoushan
(Institute of High Energy Physics)
Description
The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach in finding their origin. Locating the “knees” of the spectra is an important part of the approach and has yet to be achieved. Here we report a measurement of the mixed Hydrogen and Helium spectrum using the combination of the ARGO-YBJ experiment and of a prototype Cherenkov telescope for the LHAASO experiment. A knee feature at 640+/- 87 TeV, with a clear steepening of the spectrum, is observed. This in agreement with other two independent analysis of ARGO-YBJ data, and provides new important inputs to acceleration/propagation models for galactic cosmic rays.
| Registration number following "ICRC2015-I/" | 39 |
|---|---|
| Collaboration | LHAASO |
Author
Dr
Zhang Shoushan
(Institute of High Energy Physics)
Co-authors
Prof.
Cao Zhen
(Institute of High Energy Physics)
LHAASO Collaboration ARGO-YBJ Collaboration
(China and Italy)
