Dark Matter Particle Explorer observations of high-energy cosmic ray electrons plus positrons and their physical implications

Abstract

The DArk Matter Particle Explorer (DAMPE) is a satellite-borne, high-energy particle and $\gamma$-ray detector, which is dedicated to indirectly detecting particle dark matter and studying high-energy astrophysics. The first results about precise measurement of the cosmic ray electron plus positron spectrum between 25 GeV and 4.6 TeV were published recently. The DAMPE spectrum reveals an interesting spectral softening around $0.9$ TeV and a tentative peak around $1.4$ TeV. These results have inspired extensive discussion. The detector of DAMPE, the data analysis, and the first results are introduced. In particular, the physical interpretations of the DAMPE data are reviewed.

11 pages, 9 figures. Review paper to appear in Science China Physics, Mechanics & Astronomy

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Cited by in corpus (20)

• Indication of nearby source signatures of cosmic rays from energy spectra and anisotropies
• Klein-Nishina effect and the cosmic ray electron spectrum
• Galactic diffuse gamma-ray emission from GeV to PeV energies in light of up-to-date cosmic ray measurements
• Utilizing cosmic-ray positron and electron observations to probe the averaged properties of Milky Way pulsars
• Correction Method for the Readout Saturation of the DAMPE Calorimeter
• Ultrahigh-energy diffuse gamma-ray emission from cosmic-ray interactions with medium surrounding acceleration sources
• Statistically study the optimal local sources for cosmic ray nuclei and electron
• Comparison of proton shower developments in the BGO calorimeter of the Dark Matter Particle Explorer between GEANT4 and FLUKA simulations
• Two-mediator dark matter models and cosmic electron excess
• Probing Flavor Structure of Cosmic Ray $e^{\mp }$ Spectrum and Implications for Dark Matter Indirect Searches
• Revisiting GeV-scale annihilating dark matter with the AMS-02 positron fraction
• Interpretation of the cosmic ray positron and electron excesses with an annihilating-decaying dark matter scenario
• Observing Signals of Spectral Features in the Cosmic-Ray Positrons and Electrons from Milky Way Pulsars
• On the scattering of a high-energy cosmic ray electrons off the dark matter
• Machine learning-based method of calorimeter saturation correction for helium flux analysis with DAMPE experiment
• An Unsupervised Machine Learning Method for Electron--Proton Discrimination of the DAMPE Experiment
• Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons
• Multicomponent Dark Matter in the Light of CALET and DAMPE
• A Study on Monte Carlo simulation of the radiation environment above GeV at the DAMPE orbit
• Research on electron and positron spectrum in the high-energy region based on the gluon condensation model