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• W2173990228 abstract "If dark matter inhabits an expanded hidden sector, annihilations may proceed through sequential decays or multi-body final states. We map out the potential signals and current constraints on such a framework in indirect searches, using a model-independent setup based on multi-step hierarchical cascade decays. While remaining agnostic to the details of the hidden sector model, our framework captures the generic broadening of the spectrum of secondary particles (photons, neutrinos, e+e- and antiprotons) relative to the case of direct annihilation to Standard Model particles. We explore how indirect constraints on dark matter annihilation limit the parameter space for such cascade/multi-particle decays. We investigate limits from the cosmic microwave background by Planck, the Fermi measurement of photons from the dwarf galaxies, and positron data from AMS-02. The presence of a hidden sector can change the constraints on the dark matter annihilation cross section by up to an order of magnitude in either direction (although the effect can be much smaller). We find that generally the bound from the Fermi dwarfs is most constraining for annihilations to photon-rich final states, while AMS-02 is most constraining for electron and muon final states; however in certain instances the CMB bounds overtake both, due to their approximate independence of the details of the hidden sector cascade. We provide the full set of cascade spectra considered here as publicly available code with examples at http://web.mit.edu/lns/research/CascadeSpectra.html." @default.
• W2173990228 created "2016-06-24" @default.
• W2173990228 creator A5016324584 @default.
• W2173990228 creator A5047206136 @default.
• W2173990228 creator A5083346980 @default.
• W2173990228 creator A5090203263 @default.
• W2173990228 date "2016-06-10" @default.
• W2173990228 modified "2023-09-29" @default.
• W2173990228 title "Model-independent indirect detection constraints on hidden sector dark matter" @default.
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• W2173990228 doi "https://doi.org/10.1088/1475-7516/2016/06/024" @default.
• W2173990228 hasPublicationYear "2016" @default.

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