Using Z<=2 data to constrain cosmic ray propagation models
September 27, 2019
July 02, 2021
The boron-to-carbon ratio is usually used to investigate cosmic ray transport processes. However, the results based on the boron-to-carbon ratio remains unclear. In this work, we employ other
secondary-to-primary ratios including the deuteron-to-helium 4 ratio, the helium 3-to-helium 4 ratio and the antiproton-to-proton ratio measured by recent experiments to constrain cosmic ray propagation models. Statistical tools are interfaced with the GALPROP package to perform the analysis. Both the force-field approximation and a time-, charge-, and rigidity-dependent solar
modulation model are considered to better explore the systematic uncertainties caused by solar effect. The estimated propagation parameters are compared with those derived by using the boronto-
carbon ratio to help us further understand the cosmic ray propagation mechanisms.
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