What is half a neutrino? Reviewing cosmological constraints on neutrinos and dark radiation

Neutrinos are one of the major puzzles in modern physics. Despite measurements of mass differences, the Standard Model of particle physics describes them as exactly massless. Additionally, recent measurements from both particle physics experiments and cosmology indicate the existence of more than th...

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Bibliographic Details
Published in:Publications of the Astronomical Society of Australia
Main Authors: Riemer-Sørensen, S., Parkinson, D., Davis, T. M.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press 2013
Subjects:
Cosmological parameters
Cosmology: observations
Early Universe
Elementary particles
Neutrinos
Big-bang nucleosynthesis
South-pole telescope
Power spectrum
Primordial abundance
Massive neutrinos
Model
Galaxies
Clusters
Detector
Search
1912 Space and Planetary Science
3103 Astronomy and Astrophysics
South Pole
South pole
Online Access:https://espace.library.uq.edu.au/view/UQ:305864
Description
Summary:Neutrinos are one of the major puzzles in modern physics. Despite measurements of mass differences, the Standard Model of particle physics describes them as exactly massless. Additionally, recent measurements from both particle physics experiments and cosmology indicate the existence of more than the three Standard Model species. Here, we review the cosmological evidence and its possible interpretations.

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