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All-flavour search for neutrinos from dark matter annihilations in the Milky Way with IceCube/DeepCore

  • Author(s): Aartsen, MG
  • Abraham, K
  • Ackermann, M
  • Adams, J
  • Aguilar, JA
  • Ahlers, M
  • Ahrens, M
  • Altmann, D
  • Andeen, K
  • Anderson, T
  • Ansseau, I
  • Anton, G
  • Archinger, M
  • Arguelles, C
  • Arlen, TC
  • Auffenberg, J
  • Axani, S
  • Bai, X
  • Barwick, SW
  • Baum, V
  • Bay, R
  • Beatty, JJ
  • Becker Tjus, J
  • Becker, KH
  • BenZvi, S
  • Berghaus, P
  • Berley, D
  • Bernardini, E
  • Bernhard, A
  • Besson, DZ
  • Binder, G
  • Bindig, D
  • Bissok, M
  • Blaufuss, E
  • Blot, S
  • Boersma, DJ
  • Bohm, C
  • Börner, M
  • Bos, F
  • Bose, D
  • Böser, S
  • Botner, O
  • Braun, J
  • Brayeur, L
  • Bretz, HP
  • Burgman, A
  • Casey, J
  • Casier, M
  • Cheung, E
  • Chirkin, D
  • Christov, A
  • Clark, K
  • Classen, L
  • Coenders, S
  • Collin, GH
  • Conrad, JM
  • Cowen, DF
  • Cruz Silva, AH
  • Daughhetee, J
  • Davis, JC
  • Day, M
  • de André, JPAM
  • De Clercq, C
  • del Pino Rosendo, E
  • Dembinski, H
  • De Ridder, S
  • Desiati, P
  • de Vries, KD
  • de Wasseige, G
  • de With, M
  • DeYoung, T
  • Díaz-Vélez, JC
  • di Lorenzo, V
  • Dujmovic, H
  • Dumm, JP
  • Dunkman, M
  • Eberhardt, B
  • Ehrhardt, T
  • Eichmann, B
  • Euler, S
  • Evenson, PA
  • Fahey, S
  • Fazely, AR
  • Feintzeig, J
  • Felde, J
  • Filimonov, K
  • Finley, C
  • Flis, S
  • Fösig, CC
  • Franckowiak, A
  • Fuchs, T
  • Gaisser, TK
  • Gaior, R
  • Gallagher, J
  • Gerhardt, L
  • Ghorbani, K
  • et al.
Abstract

© The Author(s) 2016. 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- 23cm3s- 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.

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