New Measurement of the Antiproton-to-Proton Flux Ratio up to 100 GeV in the Cosmic Radiation
Top Cited Papers
- 2 February 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 102 (5) , 051101
- https://doi.org/10.1103/physrevlett.102.051101
Abstract
A new measurement of the cosmic-ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented. The results were obtained with the PAMELA experiment, which was launched into low-Earth orbit on-board the Resurs-DK1 satellite on June 15th 2006. During 500 days of data collection a total of about 1000 antiprotons have been identified, including 100 above an energy of 20 GeV. The high-energy results are a tenfold improvement in statistics with respect to all previously published data. The data follow the trend expected from secondary production calculations and significantly constrain contributions from exotic sources, e.g., dark matter particle annihilations.Keywords
All Related Versions
This publication has 18 references indexed in Scilit:
- The BESS ProgramNuclear Physics B - Proceedings Supplements, 2007
- PAMELA – A payload for antimatter matter exploration and light-nuclei astrophysicsAstroparticle Physics, 2006
- Particle dark matter: evidence, candidates and constraintsPhysics Reports, 2005
- Measurement of the Cosmic-Ray Antiproton-to-Proton Abundance Ratio between 4 and 50 GeVPhysical Review Letters, 2001
- The Cosmic‐Ray Antiproton Flux between 3 and 49 GeVThe Astrophysical Journal, 2001
- Supersymmetric dark matterPublished by Elsevier ,1999
- Measurement of Cosmic-Ray Antiprotons from 3.7 to 19 GeVThe Astrophysical Journal, 1996
- Antiprotons in the cosmic radiationNature, 1981
- Evidence for the Existence of Cosmic-Ray AntiprotonsPhysical Review Letters, 1979
- Black hole explosions?Nature, 1974