dc.contributor.author Abramowski, A. dc.contributor.author Büsching, I. dc.contributor.author De Jager, O.C. dc.contributor.author Venter, C. dc.contributor.author Vorster, M. dc.date.accessioned 2012-11-26T10:34:26Z dc.date.available 2012-11-26T10:34:26Z dc.date.issued 2011 dc.identifier.citation Abramowski, A. et al. 2011. Search for a dark matter annihilation signal from the galactic center halo with H.E.S.S. Physical review letters, 106(16):1-6. [http://prl.aps.org/] en_US dc.identifier.issn 0031-9007 dc.identifier.issn 1079-7114 (Online) dc.identifier.uri http://hdl.handle.net/10394/7782 dc.identifier.uri http://dx.doi.org/10.1103/PhysRevLett.106.161301 dc.description.abstract A search for a very-high-energy (VHE; ≥100  GeV) γ-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance r∼45–150  pc from the Galactic center. The background-subtracted γ-ray spectrum measured with the High Energy Stereoscopic System (H.E.S.S.) γ-ray instrument in the energy range between 300 GeV and 30 TeV shows no hint of a residual γ-ray flux. Assuming conventional Navarro-Frenk-White and Einasto density profiles, limits are derived on the velocity-weighted annihilation cross section ⟨σv⟩ as a function of the DM particle mass. These are among the best reported so far for this energy range and in particular differ only little between the chosen density profile parametrizations. In particular, for the DM particle mass of ∼1  TeV, values for ⟨σv⟩ above 3×10-25  cm3 s-1 are excluded for the Einasto density profile. en_US dc.language.iso en en_US dc.publisher American Physical Society (APS) en_US dc.subject Dark matter en_US dc.subject gamma-ray en_US dc.title Search for a dark matter annihilation signal from the galactic center halo with H.E.S.S. en_US dc.type Article en_US dc.contributor.researchID 12006653 - Venter, Christo
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