期刊
PHYSICAL REVIEW LETTERS
卷 129, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.129.111101
关键词
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资金
- German Ministry for Education and Research (BMBF)
- Max Planck Society
- German Research Foundation (DFG)
- Helmholtz Association
- Alexander von Humboldt Foundation
- French Ministry of Higher Education, Research and Innovation [CNRS/IN2P3]
- Centre National de la Recherche Scientifique(CNRS/INSU)
- U.K. Science and Technology Facilities Council (STFC)
- Knut and Alice Wallenberg Foundation
- Polish Ministry of Education and Science [2021/WK/06]
- Centre National de la Recherche Scientifique (CNRS/IN2P3)
- National Research Foundation
- Commissariat a l energie atomique et aux energies alternatives (CEA)
- University of Namibia
- South African Department of Science and Technology and National Research Foundation
- National Commission on Research, Science & Technology of Namibia (NCRST)
- Austrian Federal Ministry of Education, Science and Research
- Austrian Science Fund (FWF)
- Australian Research Council (ARC)
- Japan Society for the Promotion ofScience
- University of Amsterdam
- EGI Federation
This study presents the first results of a search for dark matter (DM) particle annihilation signals in the central region of the Milky Way using observations from the Inner Galaxy Survey conducted with the H.E.S.S. array of telescopes. No significant gamma-ray excess is found, and exclusion limits on the annihilation cross section are set assuming different DM density profiles. The constraints obtained are the strongest in the TeV DM mass range so far.
The central region of the Milky Way is one of the foremost locations to look for dark matter (DM) signatures. We report the first results on a search for DM particle annihilation signals using new observations from an unprecedented gamma-ray survey of the Galactic Center (GC) region, i.e., the Inner Galaxy Survey, at very high energies (& GSIM;100 GeV) performed with the H.E.S.S. array of five ground-based Cherenkov telescopes. No significant gamma-ray excess is found in the search region of the 2014-2020 dataset and a profile likelihood ratio analysis is carried out to set exclusion limits on the annihilation cross section (sigma v). Assuming Einasto and Navarro-Frenk-White (NFW) DM density profiles at the GC, these constraints are the strongest obtained so far in the TeV DM mass range. For the Einasto profile, the constraints reach (sigma v) values of 3.7 x 10-26 cm3 s-1 for 1.5 TeV DM mass in the W+W- annihilation channel, and 1.2 x 10-26 cm3 s-1 for 0.7 TeV DM mass in the tau+tau- annihilation channel. With the H.E.S.S. Inner Galaxy Survey, ground-based gamma-ray observations thus probe (sigma v) values expected from thermal-relic annihilating TeV DM particles.
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