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CERN Accelerating science

Article
Report number arXiv:1810.00995 ; DESY 18-157 ; DESY-18-157 ; CERN-TH-2018-201
Title Searches for gamma-ray lines and `pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S
Author(s)

Abdalla, H. (Potchefstroom U.) ; Aharonian, F. (Heidelberg, Max Planck Inst. ; Dublin Inst. ; NAS Armenia, Yerevan) ; Ait Benkhali, F. (Heidelberg, Max Planck Inst.) ; Angüner, E.O. (Marseille, CPPM) ; Arakawa, M. (Rikkyo U.) ; Arcaro, C. (Potchefstroom U.) ; Armand, C. (Annecy, LAPP) ; Arrieta, M. (LUTH, Meudon) ; Backes, M. (Namibia U. ; Potchefstroom U.) ; Barnard, M. (Potchefstroom U.) ; Becherini, Y. (Linkoping U.) ; Becker Tjus, J. (Ruhr U., Bochum (main)) ; Berge, D. (DESY, Zeuthen) ; Bernhard, S. (Innsbruck U., Inst. Astrophys.) ; Bernlöhr, K. (Heidelberg, Max Planck Inst.) ; Blackwell, R. (Adelaide U.) ; Böttcher, M. (Potchefstroom U.) ; Boisson, C. (LUTH, Meudon) ; Bolmont, J. (Paris U., VI-VII) ; Bonnefoy, S. (DESY, Zeuthen) ; Bordas, P. (Heidelberg, Max Planck Inst.) ; Bregeon, J. (U. Montpellier 2, LUPM) ; Brun, F. (CENBG, Gradignan) ; Brun, P. (IRFU, Saclay) ; Bryan, M. (U. Amsterdam, GRAPPA) ; Büchele, M. (Erlangen - Nuremberg U., ECAP) ; Bulik, T. (Warsaw U. Observ.) ; Bylund, T. (Linkoping U.) ; Capasso, M. (Tubingen U., IAAT) ; Caroff, S. (Ecole Polytechnique) ; Carosi, A. (Annecy, LAPP) ; Casanova, S. (Cracow, INP ; Heidelberg, Max Planck Inst.) ; Cerruti, M. (Paris U., VI-VII) ; Chakraborty, N. (Heidelberg, Max Planck Inst.) ; Chandra, S. (Potchefstroom U.) ; Chaves, R.C.G. (U. Montpellier 2, LUPM) ; Chen, A. (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Colafrancesco, S. (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Condon, B. (CENBG, Gradignan) ; Davids, I.D. (Namibia U.) ; Deil, C. (Heidelberg, Max Planck Inst.) ; Devin, J. (U. Montpellier 2, LUPM) ; deWilt, P. (Adelaide U.) ; Dirson, L. (Hamburg U.) ; Djannati-Atai, A. (APC, Paris) ; Dmytriiev, A. (LUTH, Meudon) ; Donath, A. (Heidelberg, Max Planck Inst.) ; Doroshenko, V. (Tubingen U., IAAT) ; Drury, L.O'C. (Dublin Inst.) ; Dyks, J. (Warsaw, Copernicus Astron. Ctr.) ; Egberts, K. (Potsdam U.) ; Emery, G. (Paris U., VI-VII) ; Ernenwein, J.-P. (Marseille, CPPM) ; Eschbach, S. (Erlangen - Nuremberg U., ECAP) ; Fegan, S. (Ecole Polytechnique) ; Fiasson, A. (Annecy, LAPP) ; Fontaine, G. (Ecole Polytechnique) ; Funk, S. (Erlangen - Nuremberg U., ECAP) ; Füßling, M. (DESY, Zeuthen) ; Gabici, S. (APC, Paris) ; Gallant, Y.A. (U. Montpellier 2, LUPM) ; Gaté, F. (Annecy, LAPP) ; Giavitto, G. (DESY, Zeuthen) ; Glawion, D. (Heidelberg Observ.) ; Glicenstein, J.F. (IRFU, Saclay) ; Gottschall, D. (Tubingen U., IAAT) ; Grondin, M.-H. (CENBG, Gradignan) ; Hahn, J. (Heidelberg, Max Planck Inst.) ; Haupt, M. (DESY, Zeuthen) ; Heinzelmann, G. (Hamburg U.) ; Henri, G. (IPAG) ; Hermann, G. (Heidelberg, Max Planck Inst.) ; Hinton, J.A. (Heidelberg, Max Planck Inst.) ; Hofmann, W. (Heidelberg, Max Planck Inst.) ; Hoischen, C. (Potsdam U.) ; Holch, T.L. (Humboldt U., Berlin) ; Holler, M. (Innsbruck U., Inst. Astrophys.) ; Horns, D. (Hamburg U.) ; Huber, D. (Innsbruck U., Inst. Astrophys.) ; Iwasaki, H. (Rikkyo U.) ; Jacholkowska, A. (Paris U., VI-VII) ; Jamrozy, M. (Jagiellonian U., Astron. Observ.) ; Jankowsky, D. (Erlangen - Nuremberg U., ECAP) ; Jankowsky, F. (Heidelberg Observ.) ; Jouvin, L. (APC, Paris) ; Jung-Richardt, I. (Erlangen - Nuremberg U., ECAP) ; Kastendieck, M.A. (Hamburg U.) ; Katarzyński, K. (Nicholas Copernicus U.) ; Katsuragawa, M. (Tokyo U., IPMU) ; Katz, U. (Erlangen - Nuremberg U., ECAP) ; Kerszberg, D. (Paris U., VI-VII) ; Khangulyan, D. (Rikkyo U.) ; Khélifi, B. (APC, Paris) ; King, J. (Heidelberg Observ.) ; Klepser, S. (DESY, Zeuthen) ; Kluźniak, W. (Warsaw, Copernicus Astron. Ctr.) ; Komin, Nu. (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Kosack, K. (IRFU, Saclay) ; Krakau, S. (Ruhr U., Bochum (main)) ; Kraus, M. (Erlangen - Nuremberg U., ECAP) ; Krüger, P.P. (Potchefstroom U.) ; Lamanna, G. (Annecy, LAPP) ; Lau, J. (Adelaide U.) ; Lefaucheur, J. (IRFU, Saclay) ; Lemière, A. (APC, Paris) ; Lemoine-Goumard, M. (CENBG, Gradignan) ; Lenain, J.-P. (Paris U., VI-VII) ; Leser, E. (Potsdam U.) ; Lohse, T. (Humboldt U., Berlin) ; Lorentz, M. (IRFU, Saclay) ; López-Coto, R. (Heidelberg, Max Planck Inst.) ; Lypova, I. (DESY, Zeuthen) ; Malyshev, D. (Tubingen U., IAAT) ; Marandon, V. (Heidelberg, Max Planck Inst.) ; Marcowith, A. (U. Montpellier 2, LUPM) ; Mariaud, C. (Ecole Polytechnique) ; Martí-Devesa, G. (Innsbruck U., Inst. Astrophys.) ; Marx, R. (Heidelberg, Max Planck Inst.) ; Maurin, G. (Annecy, LAPP) ; Meintjes, P.J. (Free State U.) ; Mitchell, A.M.W. (Heidelberg, Max Planck Inst.) ; Moderski, R. (Warsaw, Copernicus Astron. Ctr.) ; Mohamed, M. (Heidelberg Observ.) ; Mohrmann, L. (Erlangen - Nuremberg U., ECAP) ; Moulin, E. (IRFU, Saclay) ; Murach, T. (DESY, Zeuthen) ; Nakashima, S. (RIKEN (main)) ; de Naurois, M. (Ecole Polytechnique) ; Ndiyavala, H. (Potchefstroom U.) ; Niederwanger, F. (Innsbruck U., Inst. Astrophys.) ; Niemiec, J. (Cracow, INP) ; Oakes, L. (Humboldt U., Berlin) ; O'Brien, P. (Leeds U. ; Leicester U.) ; Odaka, H. (Tokyo U.) ; Ohm, S. (DESY, Zeuthen) ; Ostrowski, M. (Jagiellonian U., Astron. Observ.) ; Oya, I. (DESY, Zeuthen) ; Padovani, M. (U. Montpellier 2, LUPM) ; Panter, M. (Heidelberg, Max Planck Inst.) ; Parsons, R.D. (Heidelberg, Max Planck Inst.) ; Perennes, C. (Paris U., VI-VII) ; Petrucci, P.-O. (IPAG) ; Peyaud, B. (IRFU, Saclay) ; Piel, Q. (Annecy, LAPP) ; Pita, S. (APC, Paris) ; Poireau, V. (Annecy, LAPP) ; Priyana Noel, A. (Jagiellonian U., Astron. Observ.) ; Prokhorov, D.A. (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Prokoph, H. (DESY, Zeuthen) ; Pühlhofer, G. (Tubingen U., IAAT) ; Punch, M. (APC, Paris ; Linkoping U.) ; Quirrenbach, A. (Heidelberg Observ.) ; Raab, S. (Erlangen - Nuremberg U., ECAP) ; Rauth, R. (Innsbruck U., Inst. Astrophys.) ; Reimer, A. (Innsbruck U., Inst. Astrophys.) ; Reimer, O. (Innsbruck U., Inst. Astrophys.) ; Renaud, M. (U. Montpellier 2, LUPM) ; Rieger, F. (Heidelberg, Max Planck Inst.) ; Rinchiuso, L. (IRFU, Saclay) ; Romoli, C. (Heidelberg, Max Planck Inst.) ; Rowell, G. (Adelaide U.) ; Rudak, B. (Warsaw, Copernicus Astron. Ctr.) ; Ruiz-Velasco, E. (Heidelberg, Max Planck Inst.) ; Sahakian, V. (Yerevan Phys. Inst. ; NAS Armenia, Yerevan) ; Saito, S. (Rikkyo U.) ; Sanchez, D.A. (Annecy, LAPP) ; Santangelo, A. (Tubingen U., IAAT) ; Sasaki, M. (Erlangen - Nuremberg U., ECAP) ; Schlickeiser, R. (Ruhr U., Bochum (main)) ; Schüssler, F. (IRFU, Saclay) ; Schulz, A. (DESY, Zeuthen) ; Schwanke, U. (Humboldt U., Berlin) ; Schwemmer, S. (Heidelberg Observ.) ; Seglar-Arroyo, M. (IRFU, Saclay) ; Senniappan, M. (Linkoping U.) ; Seyffert, A.S. (Potchefstroom U.) ; Shafi, N. (U. Witwatersrand, Johannesburg, Sch. Phys.) ; Shilon, I. (Erlangen - Nuremberg U., ECAP) ; Shiningayamwe, K. (Namibia U.) ; Simoni, R. (U. Amsterdam, GRAPPA) ; Sinha, A. (APC, Paris) ; Sol, H. (LUTH, Meudon) ; Spanier, F. (Potchefstroom U.) ; Specovius, A. (Erlangen - Nuremberg U., ECAP) ; Spir-Jacob, M. (APC, Paris) ; Stawarz, L. (Jagiellonian U., Astron. Observ.) ; Steenkamp, R. (Namibia U.) ; Stegmann, C. (Potsdam U. ; DESY, Zeuthen) ; Steppa, C. (Potsdam U.) ; Takahashi, T. (Tokyo U., IPMU) ; Tavernet, J.-P. (Paris U., VI-VII) ; Tavernier, T. (IRFU, Saclay) ; Taylor, A.M. (DESY, Zeuthen) ; Terrier, R. (APC, Paris) ; Tibaldo, L. (Heidelberg, Max Planck Inst.) ; Tiziani, D. (Erlangen - Nuremberg U., ECAP) ; Tluczykont, M. (Hamburg U.) ; Trichard, C. (Ecole Polytechnique) ; Tsirou, M. (U. Montpellier 2, LUPM) ; Tsuji, N. (Rikkyo U.) ; Tuffs, R. (Heidelberg, Max Planck Inst.) ; Uchiyama, Y. (Rikkyo U.) ; van der Walt, D.J. (Potchefstroom U.) ; van Eldik, C. (Erlangen - Nuremberg U., ECAP) ; van Rensburg, C. (Potchefstroom U.) ; van Soelen, B. (Free State U.) ; Vasileiadis, G. (U. Montpellier 2, LUPM) ; Veh, J. (Erlangen - Nuremberg U., ECAP) ; Venter, C. (Potchefstroom U.) ; Viana, A. (Heidelberg, Max Planck Inst. ; Sao Paulo U., Sao Carlos) ; Vincent, P. (Paris U., VI-VII) ; Vink, J. (U. Amsterdam, GRAPPA) ; Voisin, F. (Adelaide U.) ; Völk, H.J. (Heidelberg, Max Planck Inst.) ; Vuillaume, T. (Annecy, LAPP) ; Wadiasingh, Z. (Potchefstroom U.) ; Wagner, S.J. (Heidelberg Observ.) ; Wagner, R.M. (Stockholm U., OKC) ; White, R. (Heidelberg, Max Planck Inst.) ; Wierzcholska, A. (Cracow, INP) ; Yang, R. (Heidelberg, Max Planck Inst.) ; Zaborov, D. (Ecole Polytechnique) ; Zacharias, M. (Potchefstroom U.) ; Zanin, R. (Heidelberg, Max Planck Inst.) ; Zdziarski, A.A. (Warsaw, Copernicus Astron. Ctr.) ; Zech, A. (LUTH, Meudon) ; Zefi, F. (Ecole Polytechnique) ; Ziegler, A. (Erlangen - Nuremberg U., ECAP) ; Zorn, J. (Heidelberg, Max Planck Inst.) ; Żywucka, N. (Jagiellonian U., Astron. Observ.) ; Cirelli, M. (Paris, LPTHE) ; Panci, P. (CERN) ; Sala, F. (Paris, LPTHE ; DESY) ; Silk, J. (Paris, Inst. Astrophys. ; Oxford U. ; Johns Hopkins U., Dept. Math.) ; Taoso, M. (Madrid, IFT ; INFN, Turin)

Publication 2018-11-23
Imprint 2018-10-01
Number of pages 23
Note Accepted for publication in JCAP. 18 pages, 7 figures
In: JCAP 11 (2018) 037
DOI 10.1088/1475-7516/2018/11/037
Subject category hep-ph ; Particle Physics - Phenomenology ; hep-ex ; Particle Physics - Experiment ; astro-ph.HE ; Astrophysics and Astronomy
Accelerator/Facility, Experiment HESS
Abstract 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 $\langle \sigma v \rangle \lesssim 3 \times 10^{-25}$ cm$^3$ s$^{-1}$ are obtained in the mass range of 400 GeV to 1 TeV. 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.
Copyright/License preprint: (License: arXiv nonexclusive-distrib 1.0)



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