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AMS-02 is an astrophysical experiment embarked on the International Space Station since 2011, designed to measure the fluxes of cosmic rays arriving at the Earth. AMS-02 has detected a significant excess in the positron flux at Earth that is inconsistent with the production of positrons in collisions of cosmic rays in the Galaxy. This thesis addresses the viability of a scalar two-component dark matter in the context of the AMS-02 measurements of positrons and antiprotons. Astrophysical alternatives to dark matter are briefly discusses, namely pulsars.

AMS-02 --- Quantum Field Theory --- Particle Physics --- Physics Beyond the Standard Model --- Dark Matter --- Galactic Propagation --- Physique, chimie, mathématiques & sciences de la terre > Physique --- Physique, chimie, mathématiques & sciences de la terre > Aérospatiale, astronomie & astrophysique