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Search for Dark Matter Annihilations in the Sun with the 79-String IceCube Detector
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. (Systemfysik)
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
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2013 (Engelska)Ingår i: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 110, nr 13, s. 131302-Artikel i tidskrift (Refereegranskat) 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

Ort, förlag, år, upplaga, sidor
2013. Vol. 110, nr 13, s. 131302-
Nationell ämneskategori
Fysik
Identifikatorer
URN: urn:nbn:se:su:diva-89715DOI: 10.1103/PhysRevLett.110.131302ISI: 000316800000001OAI: oai:DiVA.org:su-89715DiVA, id: diva2:620531
Forskningsfinansiär
VetenskapsrådetKnut och Alice Wallenbergs Stiftelse
Anmärkning

AuthorCount:278;

Tillgänglig från: 2013-05-08 Skapad: 2013-05-06 Senast uppdaterad: 2017-12-06Bibliografiskt granskad
Ingår i avhandling
1. Searches for Dark Matter with IceCube and DeepCore: New constraints on theories predicting dark matter particles
Öppna denna publikation i ny flik eller fönster >>Searches for Dark Matter with IceCube and DeepCore: New constraints on theories predicting dark matter particles
2013 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Stockholm: Department of Physics, Stockholm University, 2013. s. 113
Nyckelord
Dark matter, neutrinos, neutrino telescopes, IceCube, DeepCore, dark matter experiments
Nationell ämneskategori
Astronomi, astrofysik och kosmologi
Forskningsämne
fysik
Identifikatorer
urn:nbn:se:su:diva-89820 (URN)978-91-7447-716-0 (ISBN)
Disputation
2013-06-14, sal FB42, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2013-05-23 Skapad: 2013-05-10 Senast uppdaterad: 2013-05-16Bibliografiskt granskad

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Av författaren/redaktören
Bohm, ChristianDanninger, MatthiasFinley, ChadFlis, SamuelHulth, Per-OlofHultqvist, KlasSeo, Seon-HeeWalck, ChristianWolf, MartinZoll, Marcel
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FysikumOskar Klein-centrum för kosmopartikelfysik (OKC)
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Physical Review Letters
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Totalt: 109 träffar
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