Dark matter decays from the galactic center using IceCube-86

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dc.contributor Toale, Patrick A.
dc.contributor Keel, W. C.
dc.contributor Okada, Nobuchika
dc.contributor Henderson, Conor
dc.contributor Gupta, Subhadra
dc.contributor.advisor Williams, Dawn R.
dc.contributor.author Pepper, James Alan
dc.date.accessioned 2017-07-28T14:12:58Z
dc.date.available 2017-07-28T14:12:58Z
dc.date.issued 2017
dc.identifier.other u0015_0000001_0002684
dc.identifier.other Pepper_alatus_0004D_12985
dc.identifier.uri http://ir.ua.edu/handle/123456789/3280
dc.description Electronic Thesis or Dissertation
dc.description.abstract Most searches for Dark Matter primarily focus on the WIMP paradigm, which predicts dark matter masses in the GeV - 10 TeV range. However, these relatively low energy searches continue to produce null results, possibly suggesting that dark matter is something other than WIMPs. Gravitinos, on the other hand, can satisfy the cosmological constraints on dark matter, and decay with a lifetime orders of magnitude longer than the age of the universe, producing extremely high energy neutrinos. The IceCube Neutrino Observatory has already had success detecting EHE extragalactic neutrinos, and is well suited to search for dark matter in this high energy regime. This analysis sets limits on the gravitino lifetime from the high energy neutrino events observed at IceCube using three possible astrophysical explanations of the neutrino flux. The most conservative limit on the gravitino lifetime using the softest two-body decay mode was found to be $\tau_{DM} = 10^{27.6}s$. This is the first analysis developed to place a limit on the gravitino lifetime using IceCube software and simulation files, and the results are comparable to theoretical limits based on the same data set.
dc.format.extent 94 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Particle physics
dc.subject.other Astrophysics
dc.subject.other Physics
dc.title Dark matter decays from the galactic center using IceCube-86
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Dept. of Physics and Astronomy
etdms.degree.discipline Physics
etdms.degree.grantor The University of Alabama
etdms.degree.level doctoral
etdms.degree.name Ph.D.

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