Possible evidence for the stochastic acceleration of secondary antiprotons by supernova remnants
Possible evidence for the stochastic acceleration of secondary antiprotons by supernova remnants
The antiproton-to-proton ratio in the cosmic-ray spectrum is a sensitive probe of new physics. Using recent measurements of the cosmic-ray antiproton and proton fluxes in the energy range of 1-1000 GeV, we study the contribution to the $\bar{p}/p$ ratio from secondary antiprotons that are produced and subsequently accelerated within individual …