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Resonant Production of Sterile Neutrinos in the Early Universe


Gilbert, Lauren Ann (2016) Resonant Production of Sterile Neutrinos in the Early Universe. Senior thesis (Major), California Institute of Technology. doi:10.7907/BKTV-8H10.


We examine the cosmological impacts of a light resonantly produced sterile neutrino in the early universe. Such a neutrino could be produced through lepton number-driven Mikheyev-Smirnov-Wolfenstein conversion of active neutrinos, resulting in a non-thermal spectrum of both sterile and active neutrinos. If this process occurs during weak decoupling and big bang nucleosynthesis, it would affect the electron neutrino flux and therefore the n/p ratio. This allows us to use observations of primordial helium (Yp), primordial deuterium (D/H), and Neff to place limits on this process.

Item Type:Thesis (Senior thesis (Major))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Withheld
Research Advisor(s):
  • Unknown, Unknown
Thesis Committee:
  • None, None
Defense Date:13 May 2016
Record Number:CaltechTHESIS:01102018-100325254
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10627
Deposited By: Joy Painter
Deposited On:11 Jan 2018 00:19
Last Modified:04 Oct 2019 00:19

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