Catalyzed Big Bang Nucleosynthesis and the properties of charged relics in the early universe

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dc.contributor.authorKoopmans, Kristen Alanna
dc.contributor.supervisorPospelov, Maxim
dc.date.accessioned2007-08-27T23:55:55Z
dc.date.available2007-08-27T23:55:55Z
dc.date.copyright2007en_US
dc.date.issued2007-08-27T23:55:55Z
dc.degree.departmentDept. of Physics and Astronomyen_US
dc.degree.levelMaster of Science M.Sc.en_US
dc.description.abstractThe existence of charged electroweak-scale particles in the early universe can drastically affect the evolution of elemental abundances. Through the formation of Coulombic bound states with light nuclei, these exotic relic particles (hereafter referred to as X–) act to catalyze nuclear reactions by reducing their threshold energies. This thesis examines the properties of the X– bound states, and uses primordial element observations to constrain the abundance, lifetime, and mass of this exotic particle species. If the X– is a Dirac Fermion, its abundance relative to baryons is found to be YX- ~ 0.01, with a lifetime of 1500s ≤ τX- ≤ 3000s, and a mass of order 100 GeV. Assuming that the X– is a Scalar particle that decays into gravitinos, the resulting bounds become, 5x10-4 ≤ YX- ≤ 0.07, 1600s ≤ τX- ≤ 7000s, and 60GeV ≤ mX- ≤ 1000GeV. These ranges are consistent with Dark Matter constraints.en_US
dc.identifier.urihttp://hdl.handle.net/1828/207
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectParticle Physicsen_US
dc.subjectPhenomenologyen_US
dc.subjectCosmologyen_US
dc.subjectEarly Universeen_US
dc.subjectSuper Symmetryen_US
dc.subjectNucleosynthesisen_US
dc.subject.lcshUVic Subject Index::Sciences and Engineering::Physicsen_US
dc.titleCatalyzed Big Bang Nucleosynthesis and the properties of charged relics in the early universeen_US
dc.typeThesisen_US

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