Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

(H.E.S.S. Collaboration)

doi:10.1103/PhysRevLett.117.111301

Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

(H.E.S.S. Collaboration)

North-West University
Universität Hamburg
Max-Planck-Institut für Kernphysik
Dublin Institute for Advanced Studies
National Academy of Sciences of Armenia
Yerevan Physics Institute
Humboldt-Universität zu Berlin
Sorbonne Univ.
Université Savoie Mont Blanc
University of Namibia
University of Amsterdam
Linnaeus University, Växjö
Ruhr-University Bochum
Medical University of Innsbruck
University of Adelaide
Universités Paris VI and VII
University of Tübingen
Laboratoire Univers et Particules de Montpellier
Universite Paris-Saclay
University of Warsaw
Aix Marseille Université
Institute for Nuclear Physics
University of the Witwatersrand, Johannesburg
Landessternwarte Heidelberg
Univ. Bordeaux
Stockholm University
Wallenberg Academy
Astroparticule and Cosmol APC
Université Grenoble Alpes
University of Leicester
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
University of Potsdam
Université Paris-Sud
Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
c/o DESY
Jagiellonian University
University of Amsterdam
Nicolaus Copernicus University
University of the Free State

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using γ-ray observations towards the inner 300 pc of the Milky Way, with the H.E.S.S. array of ground-based Cherenkov telescopes. The analysis is based on a 2D maximum likelihood method using Galactic Center (GC) data accumulated by H.E.S.S. over the last 10 years (2004-2014), and does not show any significant γ-ray signal above background. Assuming Einasto and Navarro-Frenk-White DM density profiles at the GC, we derive upper limits on the annihilation cross section v. These constraints are the strongest obtained so far in the TeV DM mass range and improve upon previous limits by a factor 5. For the Einasto profile, the constraints reach v values of 6×10-26 cm3 s-1 in the W+W- channel for a DM particle mass of 1.5 TeV, and 2×10-26 cm3 s-1 in the τ+τ- channel for a 1 TeV mass. For the first time, ground-based γ-ray observations have reached sufficient sensitivity to probe v values expected from the thermal relic density for TeV DM particles.

langue originale	Anglais
Numéro d'article	111301
journal	Physical Review Letters
Volume	117
Numéro de publication	11
Les DOIs	https://doi.org/10.1103/PhysRevLett.117.111301
état	Publié - 8 sept. 2016

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10.1103/PhysRevLett.117.111301

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@article{87f0ccf1ca994ea8b8c5d64f8c9aa020,

title = "Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.",

abstract = "The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using γ-ray observations towards the inner 300 pc of the Milky Way, with the H.E.S.S. array of ground-based Cherenkov telescopes. The analysis is based on a 2D maximum likelihood method using Galactic Center (GC) data accumulated by H.E.S.S. over the last 10 years (2004-2014), and does not show any significant γ-ray signal above background. Assuming Einasto and Navarro-Frenk-White DM density profiles at the GC, we derive upper limits on the annihilation cross section v. These constraints are the strongest obtained so far in the TeV DM mass range and improve upon previous limits by a factor 5. For the Einasto profile, the constraints reach v values of 6×10-26 cm3 s-1 in the W+W- channel for a DM particle mass of 1.5 TeV, and 2×10-26 cm3 s-1 in the τ+τ- channel for a 1 TeV mass. For the first time, ground-based γ-ray observations have reached sufficient sensitivity to probe v values expected from the thermal relic density for TeV DM particles.",

author = "\{(H.E.S.S. Collaboration)\} and H. Abdallah and A. Abramowski and F. Aharonian and \{Ait Benkhali\}, F. and Akhperjanian, \{A. G.\} and E. Ang{\"u}ner and M. Arrieta and P. Aubert and M. Backes and A. Balzer and M. Barnard and Y. Becherini and \{Becker Tjus\}, J. and D. Berge and S. Bernhard and K. Bernl{\"o}hr and E. Birsin and R. Blackwell and M. B{\"o}ttcher and C. Boisson and J. Bolmont and P. Bordas and J. Bregeon and F. Brun and P. Brun and M. Bryan and T. Bulik and M. Capasso and J. Carr and S. Casanova and N. Chakraborty and R. Chalme-Calvet and Chaves, \{R. C.G.\} and A. Chen and J. Chevalier and M. Chr{\'e}tien and S. Colafrancesco and G. Cologna and B. Condon and J. Conrad and C. Couturier and Y. Cui and Davids, \{I. D.\} and B. Degrange and C. Deil and P. Dewilt and A. Djannati-Ata{\"i} and W. Domainko and A. Donath and S. Fegan",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = sep,

day = "8",

doi = "10.1103/PhysRevLett.117.111301",

language = "English",

volume = "117",

journal = "Physical Review Letters",

issn = "0031-9007",

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T1 - Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

AU - (H.E.S.S. Collaboration)

AU - Abdallah, H.

AU - Abramowski, A.

AU - Aharonian, F.

AU - Ait Benkhali, F.

AU - Akhperjanian, A. G.

AU - Angüner, E.

AU - Arrieta, M.

AU - Aubert, P.

AU - Backes, M.

AU - Balzer, A.

AU - Barnard, M.

AU - Becherini, Y.

AU - Becker Tjus, J.

AU - Berge, D.

AU - Bernhard, S.

AU - Bernlöhr, K.

AU - Birsin, E.

AU - Blackwell, R.

AU - Böttcher, M.

AU - Boisson, C.

AU - Bolmont, J.

AU - Bordas, P.

AU - Bregeon, J.

AU - Brun, F.

AU - Brun, P.

AU - Bryan, M.

AU - Bulik, T.

AU - Capasso, M.

AU - Carr, J.

AU - Casanova, S.

AU - Chakraborty, N.

AU - Chalme-Calvet, R.

AU - Chaves, R. C.G.

AU - Chen, A.

AU - Chevalier, J.

AU - Chrétien, M.

AU - Colafrancesco, S.

AU - Cologna, G.

AU - Condon, B.

AU - Conrad, J.

AU - Couturier, C.

AU - Cui, Y.

AU - Davids, I. D.

AU - Degrange, B.

AU - Deil, C.

AU - Dewilt, P.

AU - Djannati-Ataï, A.

AU - Domainko, W.

AU - Donath, A.

AU - Fegan, S.

PY - 2016/9/8

Y1 - 2016/9/8

N2 - The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using γ-ray observations towards the inner 300 pc of the Milky Way, with the H.E.S.S. array of ground-based Cherenkov telescopes. The analysis is based on a 2D maximum likelihood method using Galactic Center (GC) data accumulated by H.E.S.S. over the last 10 years (2004-2014), and does not show any significant γ-ray signal above background. Assuming Einasto and Navarro-Frenk-White DM density profiles at the GC, we derive upper limits on the annihilation cross section v. These constraints are the strongest obtained so far in the TeV DM mass range and improve upon previous limits by a factor 5. For the Einasto profile, the constraints reach v values of 6×10-26 cm3 s-1 in the W+W- channel for a DM particle mass of 1.5 TeV, and 2×10-26 cm3 s-1 in the τ+τ- channel for a 1 TeV mass. For the first time, ground-based γ-ray observations have reached sufficient sensitivity to probe v values expected from the thermal relic density for TeV DM particles.

AB - The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using γ-ray observations towards the inner 300 pc of the Milky Way, with the H.E.S.S. array of ground-based Cherenkov telescopes. The analysis is based on a 2D maximum likelihood method using Galactic Center (GC) data accumulated by H.E.S.S. over the last 10 years (2004-2014), and does not show any significant γ-ray signal above background. Assuming Einasto and Navarro-Frenk-White DM density profiles at the GC, we derive upper limits on the annihilation cross section v. These constraints are the strongest obtained so far in the TeV DM mass range and improve upon previous limits by a factor 5. For the Einasto profile, the constraints reach v values of 6×10-26 cm3 s-1 in the W+W- channel for a DM particle mass of 1.5 TeV, and 2×10-26 cm3 s-1 in the τ+τ- channel for a 1 TeV mass. For the first time, ground-based γ-ray observations have reached sufficient sensitivity to probe v values expected from the thermal relic density for TeV DM particles.

UR - https://www.scopus.com/pages/publications/84989843926

U2 - 10.1103/PhysRevLett.117.111301

DO - 10.1103/PhysRevLett.117.111301

M3 - Article

AN - SCOPUS:84989843926

SN - 0031-9007

VL - 117

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 111301

ER -

Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

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