Search for antimatter and dark matter and precision studies of cosmic ray fluxes on the International Space Station. AMS experiment. Results of four-year exposure

The results of cosmic rays studies obtained in the AMS experiment in 2011–2015 on the International Space Station are discussed. Research on the energy spectra of electrons and positrons at TeV energies and precision measurements of fluxes were performed. The growth of the positron fraction with energy was observed. Proton and helium spectra were also obtained. A review of theoretical models with possible explanations of the observed phenomena is presented.