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Cosmic neutrino background search experiments as decaying dark matter detectors

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arxiv 1812.08178 v2 pith:7ZUVPBME submitted 2018-12-19 hep-ph astro-ph.COhep-ex

Cosmic neutrino background search experiments as decaying dark matter detectors

classification hep-ph astro-ph.COhep-ex
keywords neutrinobackgroundcosmiccosmologicaldarkdecaysexperimentsmatter
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate the possibility that particles that are long-lived on cosmological scales, making up part or all of the dark matter, decay to neutrinos that have present-day energies around an eV. The neutrinos from these decays can potentially be visible at experiments that hope to directly observe the cosmic neutrino background through neutrino capture on tritium, such as PTOLEMY. In the context of a simple model that can realize such decays, we discuss the allowed signatures at a PTOLEMY-like experiment given current cosmological constraints.

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