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Spin-Dependent Scattering of Sub-GeV Dark Matter: Models and Constraints

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arxiv 2506.11191 v1 pith:DYDXZLQB submitted 2025-06-12 hep-ph

Spin-Dependent Scattering of Sub-GeV Dark Matter: Models and Constraints

classification hep-ph
keywords darkmatterboundsscatteringconstraintsdetectiondirectexisting
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We calculate the scattering rate of sub-GeV dark matter in solid-state targets for spin-dependent dark matter -- nucleon interactions. For dark matter particles with mass below 100 MeV, the scattering occurs predominantly through incoherent phonon production. For dark matter heavier than 100 MeV, we match onto the nuclear recoil calculation. To compare the sensitivity of future direct detection experiments with existing constraints, we consider three models with interactions which are mediated by spin-0 or spin-1 particles. This allows us to derive bounds on the cross section from searches for the mediating particle, including bounds from stellar cooling, beam dump experiments, meson factories and dark matter self-interactions. The existing bounds are very stringent, though for $m_\chi\gtrsim 100$ MeV there is parameter space which may be accessible with direct detection, depending on the exposure and background rates.

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Forward citations

Cited by 4 Pith papers

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

  1. Coherence from interference: a solvable model of sub-GeV dark matter-nucleus scattering

    hep-ph 2026-07 conditional novelty 6.0

    In an exactly solvable 1D lattice, coherent and incoherent DM-nucleus structure factors differ only by a crystal-momentum delta function that becomes unimportant for n≥2 phonons, validating hybrid Inc+LW rate calculations.

  2. Irreducible Constraints on Hadronically Interacting Sub-GeV Dark Matter

    hep-ph 2025-12 unverdicted novelty 6.0

    Sub-GeV dark matter that interacts hadronically is ruled out for nucleon scattering cross sections above 10^{-36} cm² across the keV to 100 MeV mass range by combined cosmological and particle-decay constraints.

  3. Dive deeper with SUBMARINE: SUB-Mev dArk matter diRect detectIon using bilayer grapheNE

    hep-ph 2026-04 unverdicted novelty 5.0

    Bilayer graphene enables sub-MeV dark matter detection via electronic excitations with small exposure and sidereal modulation signatures.

  4. WIMP Dark Matter within the dark photon portal

    hep-ph 2025-08 unverdicted novelty 3.0

    Derives lower limits on dark photon parameters from thermal relic density for Dirac fermion and complex scalar WIMPs and compares resulting spin-independent cross sections to direct detection upper bounds.