Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.241302
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Funding
- LAT
- NASA, United States
- DOE, United States
- CEA/Irfu, France
- IN2P3/CNRS in France
- ASI, Italy
- INFN, Italy
- MEXT, Japan
- KEK, Japan
- JAXA, Japan
- K.A. Wallenberg Foundation
- Swedish Research Council
- National Space Board in Sweden
- INAF in Italy
- CNES in France
- NASA [NNX09AD09G]
- NASA [120339, NNX09AD09G] Funding Source: Federal RePORTER
- Grants-in-Aid for Scientific Research [10J08529] Funding Source: KAKEN
- ICREA Funding Source: Custom
- Direct For Mathematical & Physical Scien
- Division Of Physics [0855462] Funding Source: National Science Foundation
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Satellite galaxies of the Milky Way are among the most promising targets for dark matter searches in gamma rays. We present a search for dark matter consisting of weakly interacting massive particles, applying a joint likelihood analysis to 10 satellite galaxies with 24 months of data of the Fermi Large Area Telescope. No dark matter signal is detected. Including the uncertainty in the dark matter distribution, robust upper limits are placed on dark matter annihilation cross sections. The 95% confidence level upper limits range from about 10(-26) cm(3) s(-1) at 5 GeV to about 5 x 10(-23) cm(3) s(-1) at 1 TeV, depending on the dark matter annihilation final state. For the first time, using gamma rays, we are able to rule out models with the most generic cross section (similar to 3 x 10(-26) cm(3) s(-1) for a purely s-wave cross section), without assuming additional boost factors.
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