Super-resonant dark matter at O(100) GeV masses amplifies self-scattering and annihilation cross sections via combined resonance and Sommerfeld effects, necessitating coupled Boltzmann equations to match observed relic density.
Velocity Dependence from Resonant Self-Interacting Dark Matter
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abstract
The dark matter density distribution in small-scale astrophysical objects may indicate that dark matter is self-interacting, while observations from clusters of galaxies suggest that the corresponding cross section depends on the velocity. Using a model-independent approach, we show that resonant self-interacting dark matter (RSIDM) can naturally explain such a behavior. In contrast to what is often assumed, this does not require a light mediator. We present explicit realizations of this mechanism and discuss the corresponding astrophysical constraints.
verdicts
UNVERDICTED 2representative citing papers
MCMC fits of degenerate fermionic dark matter models to eight classical dwarf spheroidal galaxies constrain fermion masses to 100-300 eV and show current data do not strongly favor interacting over non-interacting equations of state.
citing papers explorer
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Self-Interaction of Super-Resonant Dark Matter
Super-resonant dark matter at O(100) GeV masses amplifies self-scattering and annihilation cross sections via combined resonance and Sommerfeld effects, necessitating coupled Boltzmann equations to match observed relic density.
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Dwarf Galaxy Constraints on Interacting Fermionic Dark Matter
MCMC fits of degenerate fermionic dark matter models to eight classical dwarf spheroidal galaxies constrain fermion masses to 100-300 eV and show current data do not strongly favor interacting over non-interacting equations of state.