Measurement of the antiproton/proton ratio in the few-TeV energy range with ARGO-YBJ

Abstract

Cosmic ray antiprotons provide an important probe for the study of cosmic ray propagation in the interstellar space and to investigate the existence of Galactic dark matter. The ARGO-YBJ experiment is observing the Moon shadow with high statistical significance at an energy threshold of a few hundred GeV. Using all the data collected until November 2009, we set two upper limits on the antip/p flux ratio: 5% at an energy of 1.4 TeV and 6% at 5 TeV with a confidence level of 90%. In the few-TeV range the ARGO-YBJ results are the lowest available, useful to constrain models for antiproton production in antimatter domains.

Talk given at the CRIS 2010 Conference, September 2010, Catania - Italy, 6 pages

References in corpus (3)

• PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy
• Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data
• High-energy antiprotons from old supernova remnants