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Search for Dark Matter Annihilations in the Sun with the 79-String IceCube Detector
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 110, no 13, 131302- p.Article in journal (Refereed) Published
Abstract [en]

We have performed a search for muon neutrinos from dark matter annihilation in the center of the Sun with the 79-string configuration of the IceCube neutrino telescope. For the first time, the DeepCore subarray is included in the analysis, lowering the energy threshold and extending the search to the austral summer. The 317 days of data collected between June 2010 and May 2011 are consistent with the expected background from atmospheric muons and neutrinos. Upper limits are set on the dark matter annihilation rate, with conversions to limits on spin-dependent and spin-independent scattering cross sections of weakly interacting massive particles (WIMPs) on protons, for WIMP masses in the range 20-5000 GeV=c(2). These are the most stringent spin-dependent WIMP-proton cross section limits to date above 35 GeV=c(2) for most WIMP models. DOI: 10.1103/PhysRevLett.110.131302

Place, publisher, year, edition, pages
2013. Vol. 110, no 13, 131302- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-89715DOI: 10.1103/PhysRevLett.110.131302ISI: 000316800000001OAI: oai:DiVA.org:su-89715DiVA: diva2:620531
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

AuthorCount:278;

Available from: 2013-05-08 Created: 2013-05-06 Last updated: 2017-12-06Bibliographically approved
In thesis
1. Searches for Dark Matter with IceCube and DeepCore: New constraints on theories predicting dark matter particles
Open this publication in new window or tab >>Searches for Dark Matter with IceCube and DeepCore: New constraints on theories predicting dark matter particles
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The cubic-kilometer sized IceCube neutrino observatory, constructed in the glacial ice at the South Pole, searches indirectly for dark matter via neutrinos from dark matter self-annihilations. It has a high discovery potential through striking signatures. This thesis presents searches for dark matter annihilations in the center of the Sun using experimental data collected with IceCube.

The main physics analysis described here was performed for dark matter in the form of weakly interacting massive particles (WIMPs) with the 79-string configuration of the IceCube neutrino telescope. For the first time, the DeepCore sub-array was included in the analysis, lowering the energy threshold and extending the search to the austral summer. Data from 317 days live-time are consistent with the expected background from atmospheric muons and neutrinos. Upper limits were set on the dark matter annihilation rate, with conversions to limits on the WIMP-proton scattering cross section, which initiates the WIMP capture process in the Sun.These are the most stringent spin-dependent WIMP-proton cross-sections limits to date above 35 GeV for most WIMP models.

In addition, a formalism for quickly and directly comparing event-level IceCube data with arbitrary annihilation spectra in detailed model scans, considering not only total event counts but also event directions and energy estimators, is presented. Two analyses were made that show an application of this formalism to both model exclusion and parameter estimation in models of supersymmetry.

An analysis was also conducted that extended for the first time indirect dark matter searches with neutrinos using IceCube data, to an alternative dark matter candidate, Kaluza-Klein particles, arising from theories with extra space-time dimensions.

The methods developed for the solar dark matter search were applied to look for neutrino emission during a flare of the Crab Nebula in 2010.

Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University, 2013. 113 p.
Keyword
Dark matter, neutrinos, neutrino telescopes, IceCube, DeepCore, dark matter experiments
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics
Identifiers
urn:nbn:se:su:diva-89820 (URN)978-91-7447-716-0 (ISBN)
Public defence
2013-06-14, sal FB42, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (English)
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Supervisors
Available from: 2013-05-23 Created: 2013-05-10 Last updated: 2013-05-16Bibliographically approved

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Bohm, ChristianDanninger, MatthiasFinley, ChadFlis, SamuelHulth, Per-OlofHultqvist, KlasSeo, Seon-HeeWalck, ChristianWolf, MartinZoll, Marcel
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