AMS-02 antiprotons' consistency with a secondary astrophysical origin

The Alpha Magnetic Spectrometer (AMS-02) experiment has ushered cosmic-ray physics into precision era. In an earlier paper [Genolini et al., Phys. Rev. D 99, 123028 (2019)], we designed an improved method to calibrate propagation models on the boron-to-carbon ratio data. Here we provide a robust prediction of the (p) over bar flux, accounting for several sources of uncertainties and their correlations. Combined with a correlation matrix for the (p) over bar data, we show that the latter are consistent with a secondary origin. This paper presents key elements relevant to the dark matter search in this channel, notably by pointing out the inherent difficulties in achieving predictions at the percent-level precision.