Keywords
Kosmologi
Sterile Neutrinoer
How to Cite
Abstract
The article addresses one of the most subtle and fascinating questions in modern physics: the nature of the neutrino. Drawing on both cosmological observations and particle theory, it discusses what it would mean if neutrinos are Majorana particles — their own antiparticles.
The reader is guided through the consequences for mass determinations and the evolution of the universe, including how neutrino physics affects structure formation. The article succeeds in connecting experimental constraints with theoretical models in an accessible way.
It is a strong invitation to reflect on how even extremely weakly interacting particles can have cosmological significance.
References
[1] Signe Riemer-Sørensen, David Parkinson, Tamara M. Davis (2013), “What is half a neutrino? Reviewing cosmological constraints on neutrinos and dark radiation”, Publications of the Astronomical Society of Australia. http://arxiv.org/abs/1301.7102
DOI: 10.1017/pasa.2013.18
[2] Minute Physics video på YouTube, “What is a Neutrino?”, www.youtube.com/watch?v=lAAmAbJvvJg&list=PLED25F943F8D6081C&index=50
[3] Build a Universe, interaktivt CMB-analyseprogram på WMAPs webside med lærerressourcer, http://map.gsfc.nasa.gov/resources/camb_tool
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