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Title: Probing neutrino physics with a self-consistent treatment of the weak decoupling, nucleosynthesis, and photon decoupling epochs

Journal Article · · Journal of Cosmology and Astroparticle Physics
; ;  [1]
  1. Department of Physics, University of California, San Diego, La Jolla, California 92093-0319 (United States)

We show that a self-consistent and coupled treatment of the weak decoupling, big bang nucleosynthesis, and photon decoupling epochs can be used to provide new insights and constraints on neutrino sector physics from high-precision measurements of light element abundances and Cosmic Microwave Background observables. Implications of beyond-standard-model physics in cosmology, especially within the neutrino sector, are assessed by comparing predictions against five observables: the baryon energy density, helium abundance, deuterium abundance, effective number of neutrinos, and sum of the light neutrino mass eigenstates. We give examples for constraints on dark radiation, neutrino rest mass, lepton numbers, and scenarios for light and heavy sterile neutrinos.

OSTI ID:
22525845
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
Country of Publication:
United States
Language:
English

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Constraints on vacuum energy from structure formation and Nucleosynthesis journal March 2017
Neutrino energy transport in weak decoupling and big bang nucleosynthesis journal April 2016
Neutrino quantum kinetic equations: The collision term journal August 2016
Lepton asymmetry, neutrino spectral distortions, and big bang nucleosynthesis journal March 2017
Constraints on vacuum energy from structure formation and Nucleosynthesis text January 2017
Neutrino energy transport in weak decoupling and big bang nucleosynthesis text January 2015
Neutrino Quantum Kinetic Equations: The Collision Term text January 2016
Lepton asymmetry, neutrino spectral distortions, and big bang nucleosynthesis text January 2016