Search for γ-Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

Autor: Abdallah H; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Abramowski A; Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany., Aharonian F; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany.; Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland.; National Academy of Sciences of the Republic of Armenia, Marshall Baghramian Avenue, 24, 0019 Yerevan, Armenia., Ait Benkhali F; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Angüner EO; Instytut Fizyki Jądrowej PAN, ul. Radzikowskiego 152, 31-342 Kraków, Poland., Arakawa M; Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan., Arrieta M; LUTH, Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, 5 Place Jules Janssen, 92190 Meudon, France., Aubert P; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Backes M; University of Namibia, Department of Physics, Private Bag 13301, Windhoek, Namibia., Balzer A; GRAPPA, Anton Pannekoek Institute for Astronomy and Institute of High-Energy Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands., Barnard M; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Becherini Y; Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden., Becker Tjus J; Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, D 44780 Bochum, Germany., Berge D; GRAPPA, Anton Pannekoek Institute for Astronomy and Institute of High-Energy Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands., Bernhard S; Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria., Bernlöhr K; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Blackwell R; School of Chemistry and Physics, University of Adelaide, Adelaide 5005, Australia., Böttcher M; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Boisson C; LUTH, Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, 5 Place Jules Janssen, 92190 Meudon, France., Bolmont J; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Bonnefoy S; DESY, D-15738 Zeuthen, Germany., Bordas P; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Bregeon J; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., Brun F; Université Bordeaux 1, CNRS/IN2P3, Centre d'Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France., Brun P; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Bryan M; GRAPPA, Anton Pannekoek Institute for Astronomy and Institute of High-Energy Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands., Büchele M; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Bulik T; Astronomical Observatory, The University of Warsaw, Al. Ujazdowskie 4, 00-478 Warsaw, Poland., Capasso M; Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany., Caroff S; Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France., Carosi A; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Carr J; Aix Marseille Université, CNRS/IN2P3, CPPM UMR 7346, 13288 Marseille, France., Casanova S; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany.; Instytut Fizyki Jądrowej PAN, ul. Radzikowskiego 152, 31-342 Kraków, Poland., Cerruti M; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Chakraborty N; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Chaves RCG; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., Chen A; School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa., Chevalier J; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Colafrancesco S; School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa., Condon B; Université Bordeaux 1, CNRS/IN2P3, Centre d'Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France., Conrad J; Oskar Klein Centre, Department of Physics, Stockholm University, Albanova University Center, SE-10691 Stockholm, Sweden., Davids ID; University of Namibia, Department of Physics, Private Bag 13301, Windhoek, Namibia., Decock J; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Deil C; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Devin J; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., deWilt P; School of Chemistry and Physics, University of Adelaide, Adelaide 5005, Australia., Dirson L; Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany., Djannati-Ataï A; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., Domainko W; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Donath A; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Drury LO; Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland., Dutson K; Department of Physics and Astronomy, The University of Leicester, University Road, Leicester LE1 7RH, United Kingdom., Dyks J; Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland., Edwards T; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Egberts K; Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany., Eger P; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Emery G; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Ernenwein JP; Aix Marseille Université, CNRS/IN2P3, CPPM UMR 7346, 13288 Marseille, France., Eschbach S; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Farnier C; Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.; Oskar Klein Centre, Department of Physics, Stockholm University, Albanova University Center, SE-10691 Stockholm, Sweden., Fegan S; Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France., Fernandes MV; Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany., Fiasson A; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Fontaine G; Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France., Förster A; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Funk S; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Füßling M; DESY, D-15738 Zeuthen, Germany., Gabici S; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., Gallant YA; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., Garrigoux T; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Gaté F; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Giavitto G; DESY, D-15738 Zeuthen, Germany., Giebels B; Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France., Glawion D; Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany., Glicenstein JF; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Gottschall D; Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany., Grondin MH; Université Bordeaux 1, CNRS/IN2P3, Centre d'Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France., Hahn J; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Haupt M; DESY, D-15738 Zeuthen, Germany., Hawkes J; School of Chemistry and Physics, University of Adelaide, Adelaide 5005, Australia., Heinzelmann G; Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany., Henri G; Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France., Hermann G; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Hinton JA; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Hofmann W; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Hoischen C; Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany., Holch TL; Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany., Holler M; Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria., Horns D; Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany., Ivascenko A; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Iwasaki H; Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan., Jacholkowska A; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Jamrozy M; Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland., Janiak M; Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland., Jankowsky D; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Jankowsky F; Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany., Jingo M; School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa., Jouvin L; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., Jung-Richardt I; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Kastendieck MA; Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany., Katarzyński K; Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Toruń, Poland., Katsuragawa M; Japan Aeropspace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 229-8510, Japan., Katz U; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Kerszberg D; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Khangulyan D; Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan., Khélifi B; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., King J; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Klepser S; DESY, D-15738 Zeuthen, Germany., Klochkov D; Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany., Kluźniak W; Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland., Komin N; School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa., Kosack K; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Krakau S; Institut für Theoretische Physik, Lehrstuhl IV: Weltraum und Astrophysik, Ruhr-Universität Bochum, D 44780 Bochum, Germany., Kraus M; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Krüger PP; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Laffon H; Université Bordeaux 1, CNRS/IN2P3, Centre d'Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France., Lamanna G; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Lau J; School of Chemistry and Physics, University of Adelaide, Adelaide 5005, Australia., Lees JP; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Lefaucheur J; LUTH, Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, 5 Place Jules Janssen, 92190 Meudon, France., Lemière A; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., Lemoine-Goumard M; Université Bordeaux 1, CNRS/IN2P3, Centre d'Études Nucléaires de Bordeaux Gradignan, 33175 Gradignan, France., Lenain JP; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Leser E; Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany., Liu R; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Lohse T; Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany., Lorentz M; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., López-Coto R; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Lypova I; DESY, D-15738 Zeuthen, Germany., Malyshev D; Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany., Marandon V; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Marcowith A; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., Mariaud C; Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France., Marx R; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Maurin G; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Maxted N; School of Chemistry and Physics, University of Adelaide, Adelaide 5005, Australia., Mayer M; Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany., Meintjes PJ; Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa., Meyer M; Oskar Klein Centre, Department of Physics, Stockholm University, Albanova University Center, SE-10691 Stockholm, Sweden., Mitchell AMW; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Moderski R; Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland., Mohamed M; Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany., Mohrmann L; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Morå K; Oskar Klein Centre, Department of Physics, Stockholm University, Albanova University Center, SE-10691 Stockholm, Sweden., Moulin E; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Murach T; DESY, D-15738 Zeuthen, Germany., Nakashima S; Japan Aeropspace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 229-8510, Japan., de Naurois M; Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France., Ndiyavala H; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Niederwanger F; Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria., Niemiec J; Instytut Fizyki Jądrowej PAN, ul. Radzikowskiego 152, 31-342 Kraków, Poland., Oakes L; Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany., O'Brien P; Department of Physics and Astronomy, The University of Leicester, University Road, Leicester LE1 7RH, United Kingdom., Odaka H; Japan Aeropspace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 229-8510, Japan., Ohm S; DESY, D-15738 Zeuthen, Germany., Ostrowski M; Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland., Oya I; DESY, D-15738 Zeuthen, Germany., Padovani M; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., Panter M; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Parsons RD; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Pekeur NW; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa., Pelletier G; Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France., Perennes C; Sorbonne Universités, UPMC Université Paris 06, Université Paris Diderot, Sorbonne Paris Cité, CNRS, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 place Jussieu, F-75252 Paris Cedex 5, France., Petrucci PO; Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France., Peyaud B; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France., Piel Q; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Pita S; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., Poireau V; Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université Savoie Mont-Blanc, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France., Poon H; Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany., Prokhorov D; Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden., Prokoph H; GRAPPA, Anton Pannekoek Institute for Astronomy and Institute of High-Energy Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands., Pühlhofer G; Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany., Punch M; Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.; APC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France., Quirrenbach A; Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany., Raab S; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Strasse 1, D 91058 Erlangen, Germany., Rauth R; Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria., Reimer A; Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria., Reimer O; Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria., Renaud M; Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France., de Los Reyes R; Max-Planck-Institut für Kernphysik, P.O. 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Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2018 May 18; Vol. 120 (20), pp. 201101.
DOI: 10.1103/PhysRevLett.120.201101
Abstrakt: 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 two-dimensional 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 ⟨σv⟩ for monoenergetic DM lines at the level of 4×10^{-28}  cm^{3} 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. Ground-based 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.
Databáze: MEDLINE