We report on the observation of new and unexpected properties of primary cosmic rays, He, C, and O, measured in the rigidity (momentum/charge) range 2~GV to $3$~TV with 90 million helium, 8.4 million carbon, and 7.0 million oxygen nuclei collected by the Alpha Magnetic Spectrometer on the International Space Station during the first 5 years of operation. Unexpectedly, above 60 GV, these three spectra have identical rigidity dependence. They all deviate from a single power law above 200~GV and harden in an identical way. These are new and unexpected properties of primary cosmic rays and they are challenging current model of CR production, acceleration, and propagation.
Volume 340 -
The 39th International Conference on High Energy Physics (ICHEP2018) -
Parallel: Astro-particle Physics and Cosmology
Observation of the Identical Rigidity Dependence of the Primary Cosmic Rays Helium, Carbon and Oxygen fluxes by the Alpha Magnetic Spectrometer on the International Space Station
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Published on:
August 02, 2019
Abstract
DOI: https://doi.org/10.22323/1.340.0364
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.