期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2018/11/037
关键词
dark matter detectors; dark matter experiments; dwarfs galaxies; gamma ray detectors
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]
- (CNRS/INSU)
- Commissariat a l' energie atomique et aux energies alternatives (CEA)
- U.K. Science and Technology Facilities Council (STFC)
- Knut and Alice Wallenberg Foundation
- National Science Centre, Poland [2016/22/M/ST9/00382]
- National Research Foundation
- University of Namibia
- 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)
- University of Amsterdam
- EGI Federation
- Sao Paulo Research Foundation (FAPESP) [2015/15897-1]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- European Research Council (Erc) under the EU [278234]
- ERC Project [267117]
- Marie Curie University-Paris VI, Sorbonne University
- Institut Lagrange de Paris
- Spanish Research Agency (Agencia Estatal de Investigacion) through the grant IFT Centro de Excelencia Severo Ochoa [SEV-2016-0597, FPA2015-65929-P]
- Consolider MultiDark [CSD2009-00064]
- Labex ILP [ANR-10-LABX-63]
- Agence Nationale de la Recherche, as part of the programme Investissements d'avenir [ANR-11-IDEX-0004-02]
- PIER Seed Project [PIF-2017-72]
- European Research Council (ERC) [278234] Funding Source: European Research Council (ERC)
- ESRC [ES/N013956/1] Funding Source: UKRI
Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about less than or similar to 3 x 10(-25) cm(3) s(-1) are obtained in the mass range of 400 GeV to 1TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.
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