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• W2564449572 abstract "In this paper we investigate light dark matter scenarios where annihilation to Standard Model particles at tree-level is kinematically forbidden. In such cases annihilation can be aided by massive Standard Model-like species, called {it assisters}, in the initial state that enhances the available phase space opening up novel tree-level processes. We investigate the feasibility of such non-standard {it assisted annihilation} processes to reproduce the observed relic density of dark matter. We present a simple scalar dark matter - scalar assister model where this is realised. We find that if the dark matter and assister are relatively degenerate the required relic density can be achieved for a keV-MeV scale dark matter. We briefly discuss the cosmological constraints on such dark matter scenarios." @default.
• W2564449572 created "2017-01-06" @default.
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• W2564449572 date "2017-03-23" @default.
• W2564449572 modified "2023-09-23" @default.
• W2564449572 title "Light dark matter through assisted annihilation" @default.
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• W2564449572 doi "https://doi.org/10.1088/1475-7516/2017/03/045" @default.
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