Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/42425
Title: Search for gamma-Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with HESS
Authors: Abdallah, H
Abramowski, A
Aharonian, F
Benkhali, FA
Anguner, EO
Arakawa, M
Arrieta, M
Aubert, P
Backes, M
Balzer, A
Barnard, M
Becherini, Y
Tjus, JB
Berge, D
Bernhard, S
Bernloehr, K
Blackwell, R
Bottcher, M
Boisson, C
Bolmont, J
Bonnefoy, S
Bordas, P
Bregeon, J
Brun, F
Brun, P
Bryan, M
Buechele, M
Bulik, T
Capasso, M
Caroff, S
Carosi, A
Carr, J
Casanova, S
Cerruti, M
Chakraborty, N
Chaves, RCG
Chen, A
Chevalier, J
Colafrancesco, S
Condon, B
Conrad, J
Davids, ID
Decock, J
Deil, C
Devin, J
Dewilt, P
Dirson, L
Djannati-Atai, A
Domainko, W
Donath, A
Drury, LO
Dutson, K
Dyks, J
Edwards, T
Egberts, K
Eger, P
Emery, G
Ernenwein, J-P
Eschbach, S
Farnier, C
Fegan, S
Fernandes, M
Fiasson, A
Fontaine, G
Foerster, A
Funk, S
Fuessling, M
Gabici, S
Gallant, YA
Garrigoux, T
Gate, F
Giavitto, G
Giebels, B
Glawion, D
Glicenstein, JF
Gottschall, D
Grondin, M-H
Hahn, J
Haupt, M
Hawkes, J
Heinzelmann, G
Henri, G
Hermann, G
Hinton, JA
Hofmann, W
Hoischen, C
Holch, TL
Holler, M
Horns, D
Ivascenko, A
Iwasaki, H
Jacholkowska, A
Jamrozy, M
Janiak, M
Jankowsky, D
Jankowsky, F
Jingo, M
Jouvin, L
Jung-Richardt, I
Kastendieck, MA
Katarzynski, K
Katsuragawa, M
Katz, U
Kerszberg, D
Khangulyan, D
Khelifi, B
King, J
Klepser, S
Klochkov, D
Kluzniak, W
Komin, N
Kosack, K
Krakau, S
Kraus, M
Krueger, PP
Laffon, H
Lamanna, G
Lau, J
Lees, J-P
Lefaucheur, J
Lemiere, A
Lemoine-Goumard, M
Lenain, J-P
Leser, E
Liu, R
Lohse, T
Lorentz, M
Lopez-Coto, R
Lypova, I
Malyshev, D
Marandon, V
Marcowith, A
Mariaud, C
Marx, R
Maurin, G
Maxted, N
Mayer, M
Meintjes, PJ
Meyer, M
Mitchell, AMW
Moderski, R
Mohamed, M
Mohrmann, L
Mora, K
Moulin, E
Murach, T
Nakashima, S
de Naurois, M
Ndiyavala, H
Niederwanger, F
Niemiec, J
Oakes, L
O'Brien, P
Odaka, H
Ohm, S
Ostrowski, M
Oya, I
Padovani, M
Panter, M
Parsons, RD
Pekeur, NW
Pelletier, G
Perennes, C
Petrucci, P-O
Peyaud, B
Piel, Q
Pita, S
Poireau, V
Poon, H
Prokhorov, D
Prokoph, H
Puelhofer, G
Punch, M
Quirrenbach, A
Raab, S
Rauth, R
Reimer, A
Reimer, O
Renaud, M
De Los Reyes, R
Rieger, F
Rinchiuso, L
Romoli, C
Rowell, G
Rudak, B
Rulten, CB
Sahakian, V
Saito, S
Sanchez, DA
Santangelo, A
Sasaki, M
Schandri, M
Schlickeiser, R
Schussler, F
Schulz, A
Schwanke, U
Schwemmer, S
Seglar-Arroyo, M
Settimo, M
Seyffert, AS
Shafi, N
Shilon, I
Shiningayamwe, K
Simoni, R
Sol, H
Spanier, F
Spir-Jacob, M
Stawarz, L
Steenkamp, R
Stegmann, C
Steppa, C
Sushch, I
Takahashi, T
Tavernet, J-P
Tavernier, T
Taylor, AM
Terrier, R
Tibaldo, L
Tiziani, D
Tluczykont, M
Trichard, C
Tsirou, M
Tsuji, N
Tuffs, R
Uchiyama, Y
van der Walt, J
van Eldik, C
van Rensburg, C
van Soelen, B
Vasileiadis, G
Veh, J
Venter, C
Viana, A
Vincent, P
Vink, J
Voisin, F
Voelk, HJ
Vuillaume, T
Wadiasingh, Z
Wagner, SJ
Wagner, P
Wagner, RM
White, R
Wierzcholska, A
Willmann, P
Woernlein, A
Wouters, D
Yang, R
Zaborov, D
Zacharias, M
Zanin, R
Zdziarski, AA
Zech, A
Zefi, F
Ziegler, A
Zorn, J
Zywucka, N
First Published: 15-May-2018
Publisher: American Physical Society
Citation: Physical Review Letters, 2018, 120 (20), 201101
Abstract: Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. We report on a search for a monoenergetic spectral line from self-annihilations of DM particles in the energy range from 300 GeV to 70 TeV using a twodimensional maximum likelihood method taking advantage of both the spectral and spatial features of the signal versus background. The analysis makes use of Galactic center observations accumulated over ten years (2004–2014) with the H.E.S.S. array of ground-based Cherenkov telescopes. No significant γ-ray excess above the background is found. We derive upper limits on the annihilation cross section hσvi for monoenergetic DM lines at the level of 4 × 10−28 cm3 s−1 at 1 TeV, assuming an Einasto DM profile for the Milky Way halo. For a DM mass of 1 TeV, they improve over the previous ones by a factor of 6. The present constraints are the strongest obtained so far for DM particles in the mass range 300 GeV–70 TeV. Groundbased γ-ray observations have reached sufficient sensitivity to explore relevant velocity-averaged cross sections for DM annihilation into two γ-ray photons at the level expected from the thermal relic density for TeV DM particles.
DOI Link: 10.1103/PhysRevLett.120.201101
ISSN: 0031-9007
eISSN: 1079-7114
Links: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.201101
http://hdl.handle.net/2381/42425
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2018, American Physical Society. Deposited with reference to the publisher’s open access archiving policy. (http://www.rioxx.net/licenses/all-rights-reserved)
Description: See Supplemental Material at http://link.aps.org/ supplemental/10.1103/PhysRevLett.120.201101 for more details on the observational data set at the Galactic center, the signal and background measurement technique, the expected limit computation together and a study of the systematic uncertainties. In addition, the dependency of the limits for different dark matter profiles is provided.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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