• Open Access

Boxes, boosts, and energy duality: Understanding the Galactic Center gamma-ray excess through Dynamical Dark Matter

Kimberly K. Boddy, Keith R. Dienes, Doojin Kim, Jason Kumar, Jong-Chul Park, and Brooks Thomas
Phys. Rev. D 95, 055024 – Published 28 March 2017

Abstract

Many models currently exist which attempt to interpret the excess of gamma rays emanating from the Galactic Center in terms of annihilating or decaying dark matter. These models typically exhibit a variety of complicated cascade mechanisms for photon production, leading to a nontrivial kinematics which obscures the physics of the underlying dark sector. In this paper, by contrast, we observe that the spectrum of the gamma-ray excess may actually exhibit an intriguing “energy-duality” invariance under EγE*2/Eγ for some E*. As we shall discuss, such an energy duality points back to a remarkably simple alternative kinematics which in turn is realized naturally within the Dynamical Dark Matter framework. Observation of this energy duality could therefore provide considerable information about the properties of the dark sector from which the Galactic Center gamma-ray excess might arise, and highlights the importance of acquiring more complete data for the Galactic Center excess in the energy range around 1 GeV.

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  • Received 21 October 2016

DOI:https://doi.org/10.1103/PhysRevD.95.055024

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Particles & Fields

Authors & Affiliations

Kimberly K. Boddy1,*, Keith R. Dienes2,3,†, Doojin Kim4,5,‡, Jason Kumar1,§, Jong-Chul Park6,∥, and Brooks Thomas7,¶

  • 1Department of Physics & Astronomy, University of Hawaii, Honolulu, Hawaii 96822, USA
  • 2Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
  • 3Department of Physics, University of Maryland, College Park, Maryland 20742, USA
  • 4Department of Physics, University of Florida, Gainesville, Florida 32611, USA
  • 5Theory Division, CERN, CH-1211 Geneva 23, Switzerland
  • 6Department of Physics, Chungnam National University, Daejeon 34134, Korea
  • 7Department of Physics, Lafayette College, Easton, Pennsylvania 18042, USA

  • *kboddy@hawaii.edu
  • dienes@email.arizona.edu
  • doojin.kim@cern.ch
  • §jkumar@hawaii.edu
  • jcpark@cnu.ac.kr
  • thomasbd@lafayette.edu

Article Text

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Issue

Vol. 95, Iss. 5 — 1 March 2017

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