Some Comments on the Asymptotic Limit of Antiproton-Proton Flux Radio at the Top of the Atmosphere

Using the leaky-box model the upper limit of the antiproton-proton flux ratio at the top of the atmosphere has been estimated from the latest primary nucleon spectrum and accelerator data onpp to bar pX inclusive reactions. The estimated value ofbar p/p flux ratio comes out to be (3.6±0.3)×10^-4 is in accord with the previous results but still far from the measurements.