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Motivated by the AMS project, we assume that after the Big Bang or inflationepoch, antimatter was repelled onto one brane which is separated from our branewhere all the observational matter resides. It is suggested that CP may bespontaneously broken, the two branes would correspond to ground states formatter and antimatter respectively. Generally a complex scalar field which isresponsible for the spontaneous CP violation, exists in the space between thebranes and causes a repulsive force against the gravitation. A possiblepotential barrier prevents the mater(antimatter) particles to enter the spacebetween two branes. However, by the quantum tunnelling, a sizable anti-matterflux may come to our brane. In this work by considering two possible models,i.e. the naive flat space-time and Randall-Sundrum models and using theobservational data on the visible matter in our universe as inputs, we derivethe antimatter flux which would be observed by the AMS detector.Comment: 10 pages, 4 figures and 2 tables. Replaced by new versio

New interpretation of matter-antimatter asymmetry based on branes and possible observational consequences