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Cosmological constraints on sub-GeV dark vectors

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dc.contributor.author Coffey, John
dc.date.accessioned 2020-04-21T20:18:37Z
dc.date.available 2020-04-21T20:18:37Z
dc.date.copyright 2020 en_US
dc.date.issued 2020-04-21
dc.identifier.uri http://hdl.handle.net/1828/11690
dc.description.abstract The purpose of this thesis is to recognize the effects of electromagnetic energy injection into the early Universe from decaying sub-GeV dark vectors. Decay widths and energy spectra for the most prominent channels in the sub-GeV region are calculated for various dark vector models. The models include the kinetic mixing of the dark photon with the Standard Model photon, U(1)_A' , a dark vector boson which couples to the baryon minus the lepton current, U(1)_B-L, and the last three are dark vector bosons which couple one lepton's current minus a different lepton's current, U(1)_Li-Lj where i != j = e, mu, tau . Measurements from Big Bang Nucleosynthesis and the Cosmic Microwave Background are used to constrain the lifetime, mass and coupling constant of the dark vectors. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.subject Big Bang Nucleosynthesis en_US
dc.subject Cosmic Microwave Background en_US
dc.subject dark vectors en_US
dc.subject sub-GeV en_US
dc.subject Cosmological Constraints en_US
dc.title Cosmological constraints on sub-GeV dark vectors en_US
dc.type Thesis en_US
dc.contributor.supervisor Morrissey, David
dc.contributor.supervisor Ritz, Adam
dc.degree.department Department of Physics and Astronomy en_US
dc.degree.level Master of Science M.Sc. en_US
dc.description.scholarlevel Graduate en_US


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