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We implemented a quasi time-dependent 2D stochastic model of solar modulationdescribing the transport of cosmic rays (CR) in the heliosphere. Our code canmodulate the Local Interstellar Spectrum (LIS) of a generic charged particle(light cosmic ions and electrons), calculating the spectrum at 1AU. Severalmeasurements of CR antiparticles have been performed. Here we focused ourattention on the CR antiproton component and the antiproton over proton ratio.We show that our model, using the same heliospheric parameters for bothparticles, fit the observed anti-p/p ratio. We show a good agreement withBESS-97 and PAMELA data and make a prediction for the AMS-02 experiment.

Antiproton modulation in the Heliosphere and AMS-02 antiproton over proton ratio prediction