Upper Bound on the Dark Matter Total Annihilation Cross Section

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dc.creatorBeacom, John F.
dc.creatorBell, Nicole F.
dc.creatorMack, Gregory D.
dc.date2006-08-03
dc.date2007-12-18
dc.date.accessioned2026-07-07T11:25:51Z
dc.date.available2026-07-07T11:25:51Z
dc.descriptionWe consider dark matter annihilation into Standard Model particles and show that the least detectable final states, namely neutrinos, define an upper bound on the total cross section. Calculating the cosmic diffuse neutrino signal, and comparing it to the measured terrestrial atmospheric neutrino background, we derive a strong and general bound. This can be evaded if the annihilation products are dominantly new and truly invisible particles. Our bound is much stronger than the unitarity bound at the most interesting masses, shows that dark matter halos cannot be significantly modified by annihilations, and can be improved by a factor of 10--100 with existing neutrino experiments.
dc.description4 pages, 3 figures; version accepted for publication in PRL
dc.identifierhttps://arxiv.org/abs/astro-ph/0608090
dc.identifierhttp://arxiv.org/abs/astro-ph/0608090
dc.identifierPhys.Rev.Lett.99:231301,2007
dc.identifierdoi:10.1103/PhysRevLett.99.231301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195640
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleUpper Bound on the Dark Matter Total Annihilation Cross Section
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