Speaker
Description
Latest results by AMS on the fluxes and flux ratios of charged elementary particles in the absolute rigidity range from 1 up to 2000 GV
reveal unique properties of cosmic charged elementary particles. The positron flux in the TeV region exhibits complex energy dependence.
It is described by the sum of a term associated with the positrons produced in the collision of cosmic rays, which dominates at low energies,
and a new source term, which dominates at high energies and is associated with either dark matter or astrophysical origin. The existence of
this term is established with 5σ significance. The positron source term also manifest itself in the measured electron spectrum. This is the
first indication of the existence of identical charge symmetric source term both in the positron and in the electron spectra and, as a
consequence, the existence of new physics. The positron-to-antiproton flux ratio is independent of energy and its value is determined to be
a factor of 2 with percent accuracy in the energy range from ~60 to ~500 GeV This unexpected observation indicates a common origin
of high energy antiprotons and positrons in the cosmos.
