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Research Paper#Dark Matter, Gamma-Ray Excess, Sommerfeld Enhancement🔬 ResearchAnalyzed: Jan 3, 2026 08:50

Sommerfeld Enhancement and Gamma-Ray Excess

Published:Dec 31, 2025 06:28
1 min read
ArXiv

Analysis

This paper investigates the Sommerfeld enhancement mechanism in dark matter annihilation as a possible explanation for the observed gamma-ray excess in the Milky Way halo. It proposes a model with a light scalar mediator that can reconcile the observed excess with constraints from other observations like dwarf spheroidal galaxies. The work is significant because it explores a specific particle physics model to address a potential dark matter signal.
Reference

“A minimal model with a light CP-even scalar mediator naturally produces a velocity-dependent annihilation cross section consistent with thermal freeze-out, the Milky Way excess, and limits from dwarf spheroidal galaxies.”

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Research Paper#Dark Matter, Astrophysics, Particle Physics🔬 ResearchAnalyzed: Jan 3, 2026 15:48

Sommerfeld Enhancement and Galactic Center GeV Excess

Published:Dec 30, 2025 12:45
1 min read
ArXiv

Analysis

This paper investigates how background forces, arising from the presence of a finite density of background particles, can significantly enhance dark matter annihilation. It proposes a two-component dark matter model to explain the gamma-ray excess observed in the Galactic Center, demonstrating the importance of considering background effects in astrophysical environments. The study's significance lies in its potential to broaden the parameter space for dark matter models that can explain observed phenomena.
Reference

“The paper shows that a viable region of parameter space in this model can account for the gamma-ray excess observed in the Galactic Center using Fermi-LAT data.”

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