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2019

Dark matter bound state formation via emission of a charged scalar

Oncala, Ruben, Petraki, Kalliopi

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The formation of stable or meta-stable bound states can dramatically affect the phenomenology of dark matter (DM).

Although the capture into bound states via emission of a vector is known to be significant, the capture via scalar emission suffers from cancellations that render it important only within narrow parameter space.
While this is true for neutral scalar mediators, here we show that bound-state formation via emission of a charged scalar can be extremely significant.
To this end, we consider DM charged under a dark $U(1)$ force and coupled also to a light complex scalar that is charged under the same gauge symmetry.

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