Antiprotons from primordial black holes

Primordial black holes (PBHs) have motivated many studies since it was shown that they should evaporate and produce all kinds of particles. Recent experimental measurements of cosmic rays with great accuracy, theoretical investigations on the possible formation mechanisms and detailed evaporation processes have revived the interest in such astrophysical objects. This article aims at using the latest developments on antiproton propagation models together with new data from BESS, CAPRICE and AMS experiments to constrain the local amount of PBH dark matter. Depending on the diffusion halo parameters and on the details of emission mechanism, we derive an average upper limit of the order of rho < 1.7E-33 g cm^-3.