of the fit parameters upon the lower rigidity cut, to better illustrate and give meaning to the terms “low-rigidity” and “high-rigidity”parameters. Best-fit results for our three scenarios are presented in , where these scenarios are also tentatively interpreted in terms of the underlying microphysics. In , we report our conclusions and mention natural follow-up works. Note that all results are obtained for a 1D model of our Galaxy, with the size of the diffusive halo fixed. In order to allow for a broader usage of our results, as they may have some consequence in predicting the fluxes of other secondary species, provides a scaling of the high-rigidity parameters with $L$, whereas reminds the reader of the effectiveness of this description, and provides a “dictionary” to interpret the results in terms of a two-dimensional (2D) model with different halo sizes.

Transport models {#sec:def_bench}
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In this section, we introduce the generic propagation equation that we further solve semi-analytically in the framework of the  code [@Maurin2018] – for fully numerical frameworks complementary to ours, we refer the reader to Refs. [@StrongEtAl1998; @EvoliEtAl2008; @EvoliEtAl2017; @Kissmann2014; @KissmannEtAl2015]. We also set a generic CR transport configuration motivated by theoretical arguments on the microphysics of CRs, 