PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy

Details PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy

2010-07-06

arxiv.org/abs/1007.0821v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

11 pages, 3 figures, 1 table. Accepted for publication in Physical Review Letters

Scientific paper

The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and the antiproton-to-proton flux ratio which extends previously published measurements down to 60 MeV and up to 180 GeV in kinetic energy. During 850 days of data acquisition approximately 1500 antiprotons were observed. The measurements are consistent with purely secondary production of antiprotons in the galaxy. More precise secondary production models are required for a complete interpretation of the results.

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