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Dark matter decays from the galactic center using IceCube-86

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dc.contributorToale, Patrick A.
dc.contributorKeel, W. C.
dc.contributorOkada, Nobuchika
dc.contributorHenderson, Conor
dc.contributorGupta, Subhadra
dc.contributor.advisorWilliams, Dawn R.
dc.contributor.authorPepper, James Alan
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2017-07-28T14:12:58Z
dc.date.available2017-07-28T14:12:58Z
dc.date.issued2017
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractMost 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.en_US
dc.format.extent94 p.
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.otheru0015_0000001_0002684
dc.identifier.otherPepper_alatus_0004D_12985
dc.identifier.urihttp://ir.ua.edu/handle/123456789/3280
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.subjectParticle physics
dc.subjectAstrophysics
dc.subjectPhysics
dc.titleDark matter decays from the galactic center using IceCube-86en_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Physics and Astronomy
etdms.degree.disciplinePhysics
etdms.degree.grantorThe University of Alabama
etdms.degree.leveldoctoral
etdms.degree.namePh.D.

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