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Title page for ETD etd-07172019-154217


Type of Document Dissertation
Author Rachlin, Bradley Lewis
URN etd-07172019-154217
Title Methods and Examples in Flavor Model Building
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Thomas Kephart Committee Chair
Marcelo Disconzi Committee Member
Paul Sheldon Committee Member
Thomas Weiler Committee Member
Will Johns Committee Member
Keywords
  • neutrino mixing
  • standard model
  • symmetry breaking
  • group theory
Date of Defense 2019-04-12
Availability unrestricted
Abstract
The structure of the Standard Model provides many hints of new physics at energies above the electroweak scale. In particular, the mass hierarchy and mixing patterns between particles of different flavor are suggestive of an associated gauge symmetry. This flavor symmetry is spontaneously broken at a scale far above the electroweak, leaving behind a residual discrete symmetry that is used to predict fermion masses and mixing angles. Spontaneous symmetry breaking and flavor mixing in the Standard Model are discussed in order to contextualize model building efforts in the flavor sector. A general framework for breaking gauged Lie groups to discrete subgroups is then given, including predictions of resulting scalar mass spectra. Finally, a model with a specific discrete symmetry is constructed and used to derive experimentally compatible fermion mass hierarchies and mixing matrices.
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