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Title: A search for dark matter in the Galactic halo with HAWC

The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field-of-view observatory sensitive to 500 GeV – 100 TeV gamma rays and cosmic rays. With its observations over 2/3 of the sky every day, the HAWC observatory is sensitive to a wide variety of astrophysical sources, including possible gamma rays from dark matter. Dark matter annihilation and decay in the Milky Way Galaxy should produce gamma-ray signals across many degrees on the sky. The HAWC instantaneous field-of-view of 2 sr enables observations of extended regions on the sky, such as those from dark matter in the Galactic halo. Here we show limits on the dark matter annihilation cross-section and decay lifetime from HAWC observations of the Galactic halo with 15 months of data. These are some of the most robust limits on TeV and PeV dark matter, largely insensitive to the dark matter morphology. These limits begin to constrain models in which PeV IceCube neutrinos are explained by dark matter which primarily decays into hadrons.
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  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. National Autonomous Univ. of Mexico, Mexico City (Mexico)
  4. Autonomous Univ. of Chiapas (Mexico)
  5. Michoacan Univ. of Saint Nicholas of Hidalgo, Morelia (Mexico)
  6. Pennsylvania State Univ., University Park, PA (United States)
  7. Univ. of Rochester, NY (United States)
  8. Michigan Technological Univ., Houghton, MI (United States)
  9. National Inst. of Astrophysics, Optics and Electronics, Puebla (Mexico)
  10. Inst. of Nuclear Physics, Henryk Niewodniczanski Polish Academy of Sciences, Krakow (Poland)
  11. Meritorious Autonomous Univ. of Puebla (Mexico)
  12. Univ. of Guadalajara (Mexico)
  13. Univ. of Wisconsin, Madison, WI (United States)
  14. Univ. of Maryland, College Park, MD (United States)
  15. Max-Planck Inst. for Nuclear Physics, Heidelberg (Germany)
  16. Univ. of New Mexico, Albuquerque, NM (United States)
  17. Georgia Inst. of Technology, Atlanta, GA (United States)
  18. Michigan State Univ., East Lansing, MI (United States)
  19. Polytechnic Univ. of Pachuca (Mexico)
  20. National Polytechnic Inst., Mexico City (Mexico)
  21. Autonomous Univ. of the State of Hidalgo, Pachuca (Mexico)
  22. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  23. Univ. of California, Santa Cruz, CA (United States)
  24. Stanford Univ., CA (United States)
  25. Univ. of California, Irvine, CA (United States)
  26. Center for Research and Advanced Studies of the National Polytechnic Inst. (CINVESTAV), Mexico City (Mexico)
Publication Date:
Report Number(s):
LA-UR-17-29899
Journal ID: ISSN 1475-7516
Grant/Contract Number:
AC52-06NA25396; SC0012567; SC0013999; 271051; 232656; 260378; 179588; 239762; 254964; 271737; 258865; 243290; 132197; 281653; IG100317; IN111315; IN111716-3; IA102715; 109916; IA102917; DEC-2014/13/B/ST9/945
Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2018; Journal Issue: 2; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); LANL Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); National Council of Science and Technology (CONACYT) (Mexico); National Autonomous Univ. of Mexico; Polish Science Centre
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy and Astrophysics
OSTI Identifier:
1430014