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Title:
What Is Half a Neutrino? Reviewing Cosmological Constraints on Neutrinos and Dark Radiation
Authors:
Riemer-Sørensen, S.; Parkinson, D.; Davis, T. M.
Affiliation:
AA(School of Mathematics and Physics, University of Queensland, Brisbane 4072, Queensland, Australia), AB(School of Mathematics and Physics, University of Queensland, Brisbane 4072, Queensland, Australia ), AC(School of Mathematics and Physics, University of Queensland, Brisbane 4072, Queensland, Australia)
Publication:
Publications of the Astronomical Society of Australia, Volume 30, id.e029 11 pp. (PASA Homepage)
Publication Date:
03/2013
Origin:
CUP
Astronomy Keywords:
cosmological parameters, cosmology: observations, early Universe, elementary particles, neutrinos
Abstract Copyright:
2013: Astronomical Society of Australia
DOI:
10.1017/pas.2013.005
Bibliographic Code:
2013PASA...30...29R

Abstract

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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