Boxes, boosts, and energy duality: Understanding the Galactic Center gamma-ray excess through Dynamical Dark Matter
AffiliationUniv Arizona, Dept Phys
MetadataShow full item record
PublisherAMER PHYSICAL SOC
CitationBoxes, boosts, and energy duality: Understanding the Galactic Center gamma-ray excess through Dynamical Dark Matter 2017, 95 (5) Physical Review D
JournalPhysical Review D
RightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.
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AbstractMany 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 E-gamma -> E-*(2)/E-gamma. 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.
VersionFinal published version
SponsorsNational Science Foundation under CAREER [PHY-1250573]; Department of Energy [DE-FG0213ER41976]; National Science Foundation through its employee IR/D program; U.S. Department of Energy [DE-SC0010296]; Korean Research Foundation (KRF) through the CERN- Korea Fellowship program; National Research Foundation of Korea [NRF2013R1A1A2061561, 2016R1C1B2015225]