Speaker
Description
Precision measurements by AMS of the fluxes of cosmic ray positrons, electrons, antiprotons, protons and light nuclei as well as their ratios reveal several unexpected and intriguing features. The presented measurements extend the energy range of the previous observations with much increased precision. The new results show that the positron flux rises from ∼10 GeV above the rate expected from cosmic ray collisions with interstellar gas and at energies ~300 GeV exhibits behavior consistent with a new source of high energy positrons. Surprisingly, at similar rigidities the spectra of cosmic ray nuclei show progressive hardening over the interval of few hundred GV. Most importantly, AMS continues studies of complex antimatter candidates with stringent detector verification and collection of additional data.
