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Limits on a Muon Flux from Kaluza-Klein Dark Matter Annihilations  in the Sun from the IceCube 22-string Detector
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
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2010 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 81, no 5, 057101- p.Article in journal (Refereed) Published
Abstract [en]

A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross sections for LKP masses in the range 250-3000 GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.

Place, publisher, year, edition, pages
2010. Vol. 81, no 5, 057101- p.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-41120DOI: 10.1103/PhysRevD.81.057101ISI: 000276194200102OAI: oai:DiVA.org:su-41120DiVA: diva2:328383
Projects
IceCube
Note
Publikationen har totalt 259 författare, R. Abbasi et al.Available from: 2010-07-02 Created: 2010-07-02 Last updated: 2017-12-12Bibliographically 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, ChadHulth, Per OlofHultqvist, KlasJohansson, HenrikSeo, Seon-HeeWalck, ChristianWikström, Gustav
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Physical Review D. Particles and fields
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