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Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force

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arxiv 2008.00529 v3 pith:ODKGEYRN submitted 2020-08-02 hep-ph

classification hep-ph
keywords darksectormattercross-sectionforcegalaxyhiddenscales
verification ladder T0 review T1 audit T2 compute T3 formal
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The short distance behavior of dark matter (DM) at galaxy scales exhibits several features not explained by the typical cold dark matter (CDM) with velocity-independent cross-section. We discuss a particle physics model with a hidden sector interacting feebly with the visible sector where a dark fermion self-interacts via a dark force with a light dark photon as the mediator. We study coupled Boltzmann equations involving two temperatures, one for each sector. We fit the velocity-dependent DM cross-section to the data from scales of dwarf galaxies to clusters consistent with relic density constraint.

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Cited by 3 Pith papers

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

  1. Freeze-in Production of Non-Abelian Millicharged Vector Dark Matter

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A hidden SU(2) gauge sector broken to a massless dark photon can produce vector dark matter via freeze-in with portal couplings near 10^-7.

  2. Electroweak right-handed neutrino portal dark matter

    hep-ph 2025-12 conditional novelty 5.0 of 10

    In neutrino-portal dark matter, ignoring internal dark-sector interactions during freeze-in can underestimate the final relic abundance by 30–95%.

  3. Can a secluded self-interacting dark sector generate detectable gravitational waves?

    hep-ph 2025-02 conditional novelty 4.0 of 10

    In a secluded self-interacting dark sector with a dark U(1)' and dark radiation, existing Neff and Lyman-alpha limits remove nearly all gravitational-wave-detectable parameter space; one charge assignment keeps a smal...

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