Cosmic ray antiprotons at high energies Article Swipe
YOU?
·
· 2017
· Open Access
·
· DOI: https://doi.org/10.1088/1475-7516/2017/02/048
· OA: W2580190263
Cosmic ray antiprotons provide a powerful tool to probe dark matter\nannihilations in our galaxy. The sensitivity of this important channel is,\nhowever, diluted by sizable uncertainties in the secondary antiproton\nbackground. In this work, we improve the calculation of secondary antiproton\nproduction with a particular focus on the high energy regime. We employ the\nmost recent collider data and identify a substantial increase of antiproton\ncross sections with energy. This increase is driven by the violation of Feynman\nscaling as well as by an enhanced strange hyperon production. The updated\nantiproton production cross sections are made publicly available for\nindependent use in cosmic ray studies. In addition, we provide the correlation\nmatrix of cross section uncertainties for the AMS-02 experiment. At high\nenergies, the new cross sections improve the compatibility of the AMS-02 data\nwith a pure secondary origin of antiprotons in cosmic rays.\n
