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Title:Experimental bounds on sterile-active neutrino mixing angles
Authors:Petač, Mihael (Authorship owner)
Petač, Mihael (Author)
Files:.pdf document.pdf (1,93 MB)
 
Language:English
Work type:Not categorized (r6)
Tipology:2.09 - Master's Thesis
Organization:UNG - University of Nova Gorica
Abstract:Despite the success of the Standard Model in the last few decades, we know it is not complete. There is strong motivation for assuming the existence of additional heavy neutral leptons, which can account for active neutrino masses and possibly also have cosmological implications. In this work I consider the Standard Model with two neutral lepton singlets (sterile neutrinos) with degenerated masses in the range 20MeV - 2GeV. The constraints on the active-sterile neutrino mixing angles are evaluated based on recent neutrino oscillations data. Using these constraints the bounds from accelerator experiments are reanalyzed for the case of the considered model. Finally, the results are compared with cosmological constraints coming from Big Bang nucleosynthesis and the nMSM resonant leptogenesis.
Keywords:Sterile neutrinos, Neutrino mixing, See-saw, High-Energy Physics - Phenomenology, High-Energy Physics - Experiments
Year of publishing:2015
Number of pages:77
COBISS_ID:78843139 Link is opened in a new window
URN:URN:SI:UNG:REP:JMRKMN02
Views:527
Downloads:16
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