Presents a tensorized GPU implementation of the 2-to-2 elastic self-collision operator for dark-sector particles and applies it to a two-source freeze-in scenario where self-interactions erase bimodal features.
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In a two-scalar dark sector, non-equilibrium phase-space evolution during sequential freeze-in alters the dark matter relic abundance by up to an order of magnitude relative to the standard number-density treatment.
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.
An explicit model is built where Dirac fermion dark matter semi-annihilates to boosted dark matter plus neutrinos, with two-loop radiative neutrino masses, requiring a mediator mass of O(1) MeV to reach O(10^{-36}) cm² scattering cross section detectable in DUNE and DARWIN.
citing papers explorer
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KineticXGPU: A Tensorized Collision Operator for Dark-Sector Self-Scattering
Presents a tensorized GPU implementation of the 2-to-2 elastic self-collision operator for dark-sector particles and applies it to a two-source freeze-in scenario where self-interactions erase bimodal features.
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Exploring non-equilibrium effects in sequential freeze-in
In a two-scalar dark sector, non-equilibrium phase-space evolution during sequential freeze-in alters the dark matter relic abundance by up to an order of magnitude relative to the standard number-density treatment.
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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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Boosted dark matter via semi-annihilation in a radiative neutrino mass model
An explicit model is built where Dirac fermion dark matter semi-annihilates to boosted dark matter plus neutrinos, with two-loop radiative neutrino masses, requiring a mediator mass of O(1) MeV to reach O(10^{-36}) cm² scattering cross section detectable in DUNE and DARWIN.