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. 2016 Oct 7;117(15):151302.
doi: 10.1103/PhysRevLett.117.151302. Epub 2016 Oct 7.

H.E.S.S. Limits on Linelike Dark Matter Signatures in the 100 GeV to 2 TeV Energy Range Close to the Galactic Center

H Abdalla  1 A Abramowski  2 F Aharonian  3   4   5 F Ait Benkhali  3 A G Akhperjanian  5   6 T Andersson  7 E O Angüner  8 M Arrieta  9 P Aubert  10 M Backes  11 A Balzer  12 M Barnard  1 Y Becherini  7 J Becker Tjus  13 D Berge  14 S Bernhard  15 K Bernlöhr  3   8 E Birsin  8 R Blackwell  16 M Böttcher  1 C Boisson  9 J Bolmont  17 P Bordas  18 J Bregeon  19 F Brun  20 P Brun  20 M Bryan  12 T Bulik  21 M Capasso  18 J Carr  22 S Casanova  3   23 N Chakraborty  3 R Chalme-Calvet  17 R C G Chaves  19 A Chen  24 J Chevalier  10 M Chrétien  17 S Colafrancesco  24 G Cologna  25 B Condon  26 J Conrad  27   28 C Couturier  17 Y Cui  18 I D Davids  1   11 B Degrange  29 C Deil  3 J Devin  19 P deWilt  16 A Djannati-Ataï  30 W Domainko  3 A Donath  3 L O'C Drury  4 G Dubus  31 K Dutson  32 J Dyks  33 M Dyrda  23 T Edwards  3 K Egberts  34 P Eger  3 J-P Ernenwein  22 S Eschbach  35 C Farnier  7   27 S Fegan  29 M V Fernandes  2 A Fiasson  36 G Fontaine  29 A Förster  3 S Funk  35 M Füßling  37 S Gabici  30 M Gajdus  8 Y A Gallant  19 T Garrigoux  1 G Giavitto  37 B Giebels  29 J F Glicenstein  20 D Gottschall  18 A Goyal  38 M-H Grondin  19 M Grudzińska  21 D Hadasch  15 J Hahn  3 J Hawkes  16 G Heinzelmann  2 G Henri  31 G Hermann  3 O Hervet  9 A Hillert  3 J A Hinton  3 W Hofmann  3 C Hoischen  34 M Holler  29 D Horns  2 A Ivascenko  1 A Jacholkowska  17 M Jamrozy  38 M Janiak  33 D Jankowsky  35 F Jankowsky  25 M Jingo  24 T Jogler  35 L Jouvin  30 I Jung-Richardt  35 M A Kastendieck  2 K Katarzyński  39 U Katz  35 D Kerszberg  17 B Khélifi  30 M Kieffer  17 J King  3 S Klepser  37 D Klochkov  18 W Kluźniak  33 D Kolitzus  15 Nu Komin  24 K Kosack  20 S Krakau  13 M Kraus  35 F Krayzel  36 P P Krüger  1 H Laffon  40 G Lamanna  36 J Lau  16 J-P Lees  36 J Lefaucheur  9 V Lefranc  20 A Lemière  30 M Lemoine-Goumard  40 J-P Lenain  17 E Leser  9 R Liu  3 T Lohse  8 M Lorentz  20 I Lypova  37 V Marandon  3 A Marcowith  19 C Mariaud  29 R Marx  3 G Maurin  36 N Maxted  19 M Mayer  34 P J Meintjes  41 M Meyer  27 A M W Mitchell  3 R Moderski  33 M Mohamed  25 K Morå  27 E Moulin  20 T Murach  8 M de Naurois  29 F Niederwanger  15 J Niemiec  23 L Oakes  8 P O'Brien  32 H Odaka  3 S Ohm  37 M Ostrowski  38 S Öttl  15 I Oya  37 M Padovani  42 M Panter  3 R D Parsons  3 M Paz Arribas  8 N W Pekeur  1 G Pelletier  31 C Perennes  17 P-O Petrucci  31 B Peyaud  20 S Pita  30 H Poon  3 D Prokhorov  7 H Prokoph  7 G Pühlhofer  18 M Punch  7   30 A Quirrenbach  25 S Raab  35 A Reimer  15 O Reimer  15 M Renaud  19 R de Los Reyes  3 F Rieger  3 C Romoli  4 S Rosier-Lees  36 G Rowell  16 B Rudak  33 C B Rulten  9 V Sahakian  5   6 D Salek  43 D A Sanchez  36 A Santangelo  18 M Sasaki  18 R Schlickeiser  13 F Schüssler  20 A Schulz  37 U Schwanke  8 S Schwemmer  25 M Settimo  17 A S Seyffert  1 N Shafi  24 I Shilon  35 R Simoni  12 H Sol  9 F Spanier  1 G Spengler  27 F Spies  2 Ł Stawarz  38 R Steenkamp  11 C Stegmann  34   37 F Stinzing  35 K Stycz  37 I Sushch  1 J-P Tavernet  17 T Tavernier  30 A M Taylor  4 R Terrier  30 L Tibaldo  3 M Tluczykont  2 C Trichard  22 R Tuffs  3 J van der Walt  1 C van Eldik  35 B van Soelen  41 G Vasileiadis  19 J Veh  35 C Venter  1 A Viana  3 P Vincent  17 J Vink  12 F Voisin  16 H J Völk  3 T Vuillaume  10 Z Wadiasingh  1 S J Wagner  25 P Wagner  8 R M Wagner  27 R White  3 A Wierzcholska  23 P Willmann  35 A Wörnlein  35 D Wouters  20 R Yang  3 V Zabalza  3   32 D Zaborov  29 M Zacharias  25 A A Zdziarski  33 A Zech  9 F Zefi  29 A Ziegler  35 N Żywucka  38 H.E.S.S. Collaboration
Affiliations

H.E.S.S. Limits on Linelike Dark Matter Signatures in the 100 GeV to 2 TeV Energy Range Close to the Galactic Center

H Abdalla et al. Phys Rev Lett. .

Abstract

A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data extend the energy coverage of the previous measurement down to 100 GeV. The 18 h of data collected with the H.E.S.S. array allow one to rule out at 95% C.L. the presence of a 130 GeV line (at l=-1.5°, b=0° and for a dark matter profile centered at this location) previously reported in Fermi-LAT data. This new analysis overlaps significantly in energy with previous Fermi-LAT and H.E.S.S.

Results: No significant excess associated with dark matter annihilations was found in the energy range of 100 GeV to 2 TeV and upper limits on the gamma-ray flux and the velocity weighted annihilation cross section are derived adopting an Einasto dark matter halo profile. Expected limits for present and future large statistics H.E.S.S. observations are also given.

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