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Cosmic ray (CR) physics has entered a precision-driven era. With the latestAMS-02 nuclei data (boron-to-carbon ratio, proton flux, helium flux andantiproton-to-proton ratio), we perform a global fitting and constrain theprimary source and propagation parameters of cosmic rays in the Milky Way byconsidering 3 schemes with different data sets (with and without$\bar{\mathrm{p}}/\mathrm{p}$ data) and different propagation models(diffusion-reacceleration and diffusion-reacceleration-convection models). Wefind that the data set with $\bar{\mathrm{p}}/\mathrm{p}$ data can remove thedegeneracy between the propagation parameters effectively and it favors themodel with a very small value of convection (or disfavors the model withconvection). The separated injection spectrum parameters are used for protonand other nucleus species, which reveal the different breaks and slopes amongthem. Moreover, the helium abundance, antiproton production cross sections andsolar modulation are parametrized in our global fitting. Benefited from theself-consistence of the new data set, the fitting results show a little bias,and thus the disadvantages and limitations of the existed propagation modelsappear. Comparing to the best fit results for the local interstellar spectra($\phi = 0$) with the VOYAGER-1 data, we find that the primary sources orpropagation mechanisms should be different between proton and helium (or otherheavier nucleus species). Thus, how to explain these results properly is aninteresting and challenging question.

Galactic cosmic-ray model in the light of AMS-02 nuclei data