Scientists have been trying already for years to resolve the
issue whether dark matter really exists, and if so what are properties of its
constituent particles. Physicists expected that results of the most recent
measurements of anti-matter in cosmic rays arriving to Earth conducted with the
help of the AMS-02 detector on board of the International Space Station (ISS)
would help to resolve the issue. However, the presented yesterday results are
still ambiguous.
High-energy antimatter particles do not arrive to Earth
predominantly from any selected direction. That may suggest that we are
observing effects of annihilation of particles within a cloud of dark matter
("halo") evenly surrounding our galaxy.