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Capture and decay of electroweak WIMPonium

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Figure

Figure 1. WIMPs exchange a ladder of weak gauge bosons, which gives rise to a non-local potential in the nonrelativistic limit
Figure 3. The energy spectrum of bound states for each spin configuration in the large M χ limit.
Figure 5. WIMPs exchange ladder W ± bosons, which can radiate ultrasoft, electric dipole photons.
Figure 6. Our numerical (solid) and exact results in the SU(2)-symmetric limit (dotted) for the decay channels of the lowest-energy bound states we capture into in each spin configurations
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