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The AMS-02 experiment measured several secondary-to-primary ratios enabling adetailed study of Galactic cosmic-ray transport. We constrain previouslyderived benchmark scenarios (based on AMS-02 B/C data only) using othersecondary-to-primary ratios, to test the universality of transport and thepresence of a low-rigidity diffusion break. We use the 1D thin disc/thick halopropagation model of USINE and a $\chi^2$ minimisation accounting for acovariance matrix of errors (AMS-02 systematics) and nuisance parameters(cross-sections and solar modulation uncertainties). The combined analysis ofAMS-02 Li/C, Be/C, and B/C strengthens the case for a diffusion slope of$\delta=0.50\pm 0.03$ with a low-rigidity break or upturn of the diffusioncoefficient at GV rigidities. Our simple model can successfully reproduce allconsidered data (Li/C, Be/C, B/C, N/O, and 3He/4He), although several issuesremain: (i) the quantitative agreement depends on the assumptions made on thenot well constrained correlation lengths of AMS-02 data systematics; (ii)combined analyses are very sensitive to production cross sections, and we findpost-fit values differing by $\sim5-15\%$ from their most likely values(roughly within currently estimated nuclear uncertainties); (iii) two verydistinct regions of the parameter space remain viable, either withreacceleration and convection, or with purely diffusive transport. To take fullbenefit of combined analyses of AMS-02 data, better nuclear data and a betterhandle on energy correlations in the data systematic are required. AMS-02 dataon heavier species are eagerly awaited to further explore cosmic-raypropagation scenarios.

Combined analysis of AMS-02 (Li,Be,B)/C, N/O, 3He, and 4He data