Entropy dilution from early matter domination reduces the couplings needed for multipolar dark matter to match the observed relic density, reopening regions excluded under radiation domination.
Direct and indirect limits on the electro-magnetic form factors of WIMPs
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abstract
We use the results of direct and indirect searches for weakly interacting massive particles (WIMPs) to obtain bounds on various electro-magnetic form factors of WIMPs. The limits on the recoil signal in underground dark matter detection experiments, with standard assumptions about the density and r.m.s. velocity of WIMPs in the halo, can be translated into the following model-independent bounds on the magnetic dipole, electric dipole, quadrupole and anapole moments and the polarizability of WIMPs: mu/mu_n < 1.4 10^{-4}, d < 5 10^{-21}e cm, Q < 6 10^{-7}fm^2, a/mu_n < 3 10^{-2} fm, and chi < 5 10^{-8}fm^3 for a WIMP mass of 100 GeV. The limits on fluxes of highly energetic neutrinos produced in the annihilation of WIMPs in the center of the earth and the sun lead to somewhat stronger, but more model dependent bounds.
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Proposes underground MeV-scale electron-beam production of millicharged or dipole fermions followed by CCD detection to access unconstrained parameter space.
Review of confining dark sectors summarizing dark matter candidates, abundance mechanisms, discovery channels, and applications to the abundance similarity puzzle.
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
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Multipolar Dark Matter Freeze-out in an Early Matter-Dominated Universe
Entropy dilution from early matter domination reduces the couplings needed for multipolar dark matter to match the observed relic density, reopening regions excluded under radiation domination.
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Underground Production of Electromagnetic Dark States by MeV-scale Electron Beams and Detection with CCDs
Proposes underground MeV-scale electron-beam production of millicharged or dipole fermions followed by CCD detection to access unconstrained parameter space.
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Rich Phenomenology from Simple Ingredients: A Review of Confining Dark Sectors
Review of confining dark sectors summarizing dark matter candidates, abundance mechanisms, discovery channels, and applications to the abundance similarity puzzle.
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The Dark Photon
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.