Journal article
All-flavour search for neutrinos from dark matter annihilations in the Milky Way with IceCube/DeepCore
- Abstract:
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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,<σAv>, 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 <σAv>, reaching a level of 10^−23 cm3 s^−1 , 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 1.3MB, Terms of use)
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- Publisher copy:
- 10.1140/epjc/s10052-016-4375-3
Authors
- Publisher:
- Springer
- Journal:
- European Physical Journal C More from this journal
- Volume:
- 76
- Issue:
- 10
- Pages:
- 531
- Publication date:
- 2016-09-01
- Acceptance date:
- 2016-09-15
- DOI:
- ISSN:
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1434-6052 and 1434-6044
- Keywords:
- Pubs id:
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pubs:625449
- UUID:
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uuid:0ecda984-c0e1-4b5c-ae17-3768f5e2d846
- Local pid:
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pubs:625449
- Source identifiers:
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625449
- Deposit date:
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2016-12-20
Terms of use
- Copyright holder:
- IceCube Collaboration
- Copyright date:
- 2016
- Notes:
- © The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP
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