Search for gamma-ray spectral lines with the DArk Matter Particle Explorer

Abstract

The DArk Matter Particle Explorer (DAMPE) is well suitable for searching for monochromatic and sharp $\gamma$-ray structures in the GeV$-$TeV range thanks to its unprecedented high energy resolution. In this work, we search for $\gamma$-ray line structures using five years of DAMPE data. To improve the sensitivity, we develop two types of dedicated data sets (including the BgoOnly data which is the first time to be used in the data analysis for the calorimeter-based gamma-ray observatories) and adopt the signal-to-noise ratio optimized regions of interest (ROIs) for different DM density profiles. No line signals or candidates are found between 10 and 300 GeV in the Galaxy. The constraints on the velocity-averaged cross section for $\chi \chi \to \gamma \gamma$ and the decay lifetime for $\chi \to \gamma \nu$, both at 95% confidence level, have been calculated and the systematic uncertainties have been taken into account. Comparing to the previous Fermi-LAT results, though DAMPE has an acceptance smaller by a factor of $\sim 10$, similar constraints on the DM parameters are achieved and below 100 GeV the lower limits on the decay lifetime are even stronger by a factor of a few. Our results demonstrate the potential of high-energy-resolution observations on dark matter detection.

14 pages, 8 figures. Update the content to keep up with the published version

References in corpus (12)

• A direct empirical proof of the existence of dark matter
• Dark Matter Candidates from Particle Physics and Methods of Detection
• A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
• Gamma Ray Spectrum from Gravitino Dark Matter Decay
• Dark matter constraints from box-shaped gamma-ray features
• Fermi 130 GeV gamma-ray excess and dark matter annihilation in sub-haloes and in the Galactic centre
• Strong Evidence for Gamma-ray Line Emission from the Inner Galaxy
• Search for 100 MeV to 10 GeV gamma-ray lines in the Fermi-LAT data and implications for gravitino dark matter in the $\mu \nu$SSM
• Search for Gamma-ray Emission from Dark Matter Annihilation in the Large Magellanic Cloud with the Fermi Large Area Telescope
• Search for dark matter signatures in the gamma-ray emission towards the Sun with the Fermi Large Area Telescope
• Search for gamma-ray line features from Milky Way satellites with Fermi-LAT Pass 8 data
• Search for line-like and box-shaped spectral features from nearby galaxy clusters with 11.4 years of Fermi LAT data

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