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All-flavour search for neutrinos from dark matter annihilations in the Milky Way with IceCube/DeepCore
Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia..
Tech Univ Munich, Dept Phys, D-85748 Garching, Germany..
DESY, D-15735 Zeuthen, Germany..
Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch, New Zealand..
Vise andre og tillknytning
2016 (engelsk)Inngår i: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 76, nr 10, artikkel-id 531Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present the first IceCube search for a signal of dark matter annihilations in the Milky Way using all-flavour neutrino-induced particle cascades. The analysis focuses on the DeepCore sub-detector of IceCube, and uses the surrounding IceCube strings as a veto region in order to select starting events in the DeepCore volume. We use 329 live-days of data from IceCube operating in its 86-string configuration during 2011-2012. No neutrino excess is found, the final result being compatible with the background-only hypothesis. From this null result, we derive upper limits on the velocity-averaged self-annihilation cross-section, , for dark matter candidate masses ranging from 30 GeV up to 10 TeV, assuming both a cuspy and a flat-cored dark matter halo profile. For dark matter masses between 200 GeV and 10 TeV, the results improve on all previous IceCube results on , reaching a level of 10 cm s, depending on the annihilation channel assumed, for a cusped NFW profile. The analysis demonstrates that all-flavour searches are competitive with muon channel searches despite the intrinsically worse angular resolution of cascades compared to muon tracks in IceCube.

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2016. Vol. 76, nr 10, artikkel-id 531
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Identifikatorer
URN: urn:nbn:se:uu:diva-312123DOI: 10.1140/epjc/s10052-016-4375-3ISI: 000388972200001OAI: oai:DiVA.org:uu-312123DiVA, id: diva2:1062215
Tilgjengelig fra: 2017-01-04 Laget: 2017-01-04 Sist oppdatert: 2019-05-21bibliografisk kontrollert

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Boersma, David J.Botner, OlgaBurgman, AlexanderEuler, SebastianHallgren, Allande Los Heros, Carlos PerezStröm, RickardTaavola, HenricUnger, Elisabeth

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