Implications of a 130 GeV Gamma-Ray Line for Dark Matter

doi:https://doi.org/10.1103/PhysRevD.86.043524

Title: Implications of a 130 GeV Gamma-Ray Line for Dark Matter

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Abstract

Recent reports of a gamma-ray line feature at -130 GeV in data from the Fermi Gamma-Ray Space Telescope have generated a great deal of interest in models in which dark matter particles annihilate with a sizable cross section to final states including photons. In this paper, we take a model-independent approach and discuss a number of possibilities for dark matter candidates which could potentially generate such a feature. While we identify several scenarios which could lead to such a gamma-ray line, these models are each fairly constrained. In particular, viable models require large couplings (g{>=}1-3) and additional charged particles with masses in the range of approximately -130-200 GeV. Furthermore, lower energy gamma-ray constraints from the Galactic center force us to consider scenarios in which the dark matter annihilates in the early Universe through velocity-suppressed processes or to final states which yield relatively few gamma-rays (such as e{sup +}e{sup -}, {mu}{sup +}{mu}{sup -}, or v{bar v}). An exception to these conclusions can be found in models in which the dark matter annihilates to heavy intermediate states which decay to photons to generate a linelike gamma-ray spectrum.

Authors:: Buckley, Matthew R; Hooper, Dan

Publication Date:: 2012-05-01

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1049401

Report Number(s):: FERMILAB-PUB-12-259-A
Journal ID: ISSN 1550-7998; arXiv eprint number arXiv:1205.6811; TRN: US1204824

DOE Contract Number:: AC02-07CH11359

Resource Type:: Journal Article

Journal Name:: Physical Review. D, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 86; Journal ID: ISSN 1550-7998

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANNIHILATION; CHARGED PARTICLES; COUPLINGS; CROSS SECTIONS; DATA; DECAY; GAMMA ASTRONOMY; INTERMEDIATE STATE; GEV RANGE; NONLUMINOUS MATTER; PARTICLES; PHOTONS; SPACE; TELESCOPES; UNIVERSE; Astrophysics, Phenomenology-HEP

Citation Formats


                    Buckley, Matthew R, /Fermilab, Hooper, Dan, and /Fermilab /Chicago U., Astron. Astrophys. Ctr. Implications of a 130 GeV Gamma-Ray Line for Dark Matter.  United States: N. p., 2012. 
        Web.  doi:10.1103/PhysRevD.86.043524.

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                    Buckley, Matthew R, /Fermilab, Hooper, Dan, & /Fermilab /Chicago U., Astron. Astrophys. Ctr. Implications of a 130 GeV Gamma-Ray Line for Dark Matter.  United States.  https://doi.org/10.1103/PhysRevD.86.043524

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                    Buckley, Matthew R, /Fermilab, Hooper, Dan, and /Fermilab /Chicago U., Astron. Astrophys. Ctr. Tue .  
        "Implications of a 130 GeV Gamma-Ray Line for Dark Matter".  United States.  https://doi.org/10.1103/PhysRevD.86.043524.

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@article{osti_1049401,

  title        = {Implications of a 130 GeV Gamma-Ray Line for Dark Matter},

  author       = {Buckley, Matthew R and /Fermilab and Hooper, Dan and /Fermilab /Chicago U., Astron. Astrophys. Ctr.},

  abstractNote = {Recent reports of a gamma-ray line feature at -130 GeV in data from the Fermi Gamma-Ray Space Telescope have generated a great deal of interest in models in which dark matter particles annihilate with a sizable cross section to final states including photons. In this paper, we take a model-independent approach and discuss a number of possibilities for dark matter candidates which could potentially generate such a feature. While we identify several scenarios which could lead to such a gamma-ray line, these models are each fairly constrained. In particular, viable models require large couplings (g{>=}1-3) and additional charged particles with masses in the range of approximately -130-200 GeV. Furthermore, lower energy gamma-ray constraints from the Galactic center force us to consider scenarios in which the dark matter annihilates in the early Universe through velocity-suppressed processes or to final states which yield relatively few gamma-rays (such as e{sup +}e{sup -}, {mu}{sup +}{mu}{sup -}, or v{bar v}). An exception to these conclusions can be found in models in which the dark matter annihilates to heavy intermediate states which decay to photons to generate a linelike gamma-ray spectrum.},

  doi          = {10.1103/PhysRevD.86.043524},

  url          = {https://www.osti.gov/biblio/1049401},
  journal      = {Physical Review. D, Condensed Matter and Materials Physics},

  issn         = {1550-7998},

  number       = ,

  volume       = 86,

  place        = {United States},

  year         = {2012},

  month        = {5}

}

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