Heavy Neutral Leptons During The Big Bang Nucleosynthesis Epoch

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Heavy Neutral Leptons During The Big Bang Nucleosynthesis Epoch

Type: Master thesis
Title: Heavy Neutral Leptons During The Big Bang Nucleosynthesis Epoch
Author: Sabti, Nashwan
Issue Date: 2018-07-31
Keywords: HNLs, Sterile neutrinos, nuMSM, BBN
Abstract: Heavy Neutral Leptons are well-motivated candidates for explaining beyond Standard Model phenomena such as dark matter, baryon asymmetry of the Universe and neutrino oscillations. A variety of probes, ranging from collider-based to cosmological, explore regions of their parameter space in a complementary way. This work will delve into the possibility that Big Bang Nucleosynthesis has to offer in constraining their lifetime based on cosmological measurements of the Helium-4 abundance. Results are derived for masses up to 100 MeV and a framework is laid for extending the analysis to higher masses.
Supervisor: Boyarsky, Alexey
Faculty: Faculty of Science
Department: Physics (Master)
Specialisation: Theoretical physics
ECTS Credits: 8
Handle: http://hdl.handle.net/1887/65123
 

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