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Light and Heavy Dark Matter Particles

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arxiv hep-ph/0311143 v1 pith:MKJUBNWB submitted 2003-11-11 hep-ph

Light and Heavy Dark Matter Particles

classification hep-ph
keywords darkmatterannihilationsparticlesexistencelightaccomodatebeen
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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It has recently been pointed out that the 511 keV emission line detected by Integral/SPI from the bulge of our galaxy could be explained by annihilations of light Dark Matter particles into e^+ e^-. If such a signature is confirmed, then one might expect a conflict with the interpretation of very high energy gamma rays if they also turn out to be due to Dark Matter annihilations. Here, we propose a way to accomodate the existence of both signals being produced by Dark Matter annihilations through the existence of two stable (neutral) Dark Matter particles, as is possible in theories inspired from N=2 supersymmetry.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Constraints on Sub-MeV Dark Matter from Solar Reflection with DAMIC-M

    hep-ex 2026-07 conditional novelty 5.5

    With ~1.3 kg-day of DAMIC-M skipper-CCD data, solar-reflected dark matter yields 90% CL limits on the DM-electron cross section reaching 3.16e-37 cm2 at 0.1 MeV for an ultralight mediator.

  2. Neutrino lines and photon continua from cascade dark matter decay

    hep-ph 2026-07 conditional novelty 5.0

    In cascade dark-matter decay, neutrino-line searches can beat gamma-ray limits whenever the intermediate mediator is long-lived enough to suppress the photon flux.

  3. FIMPs in a two-component dark matter model with $Z_2 \times Z_4$ symmetry

    hep-ph 2026-02 conditional novelty 5.0

    In a Z2×Z4 two-component FIMP model, the scalar coupling λds can be as small as ~10^-20 to 10^-24 while h2-mediated processes still control scalar dark matter production.

  4. Super-Kamiokande Strongly Constrains Leptophilic Dark Matter Capture in the Sun

    astro-ph.HE 2025-01 unverdicted novelty 5.0

    Super-Kamiokande data constrains the DM-electron scattering cross-section for leptophilic dark matter to ~4e-41 cm2 below 100 GeV, exceeding direct detection by over an order of magnitude.