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Title: Assessing Big-Bang nucleosynthesis

Abstract

Systematic uncertainties in the light-element abundances and their evolution complicate a rigorous statistical assessment. However, using Bayesian methods we show that the following statement is robust: The predicted and measured abundances are consistent with 95% credibility only if the baryon-to-photon ratio is between 2{times}10{sup {minus}10} and 6.5{times}10{sup {minus}10} and the number of light neutrino species is less than 3.9. Our analysis suggests that the {sup 4}He abundance may have been systematically underestimated. {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.

Authors:
; ;  [1]
  1. Department of Physics, Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States)|[NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States)|[Department of Astronomy and Astrophysics, The University of Chicago, Chicago, Illinois 60637-1433 (United States)
Publication Date:
OSTI Identifier:
147873
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 75; Journal Issue: 22; Other Information: PBD: 27 Nov 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; NUCLEOSYNTHESIS; ELEMENT ABUNDANCE; BARYONS; HELIUM 4; NEUTRINOS; PHOTONS

Citation Formats

Copi, C.J., Schramm, D.N., and Turner, M.S.. Assessing Big-Bang nucleosynthesis. United States: N. p., 1995. Web. doi:10.1103/PhysRevLett.75.3981.
Copi, C.J., Schramm, D.N., & Turner, M.S.. Assessing Big-Bang nucleosynthesis. United States. doi:10.1103/PhysRevLett.75.3981.
Copi, C.J., Schramm, D.N., and Turner, M.S.. Mon . "Assessing Big-Bang nucleosynthesis". United States. doi:10.1103/PhysRevLett.75.3981.
@article{osti_147873,
title = {Assessing Big-Bang nucleosynthesis},
author = {Copi, C.J. and Schramm, D.N. and Turner, M.S.},
abstractNote = {Systematic uncertainties in the light-element abundances and their evolution complicate a rigorous statistical assessment. However, using Bayesian methods we show that the following statement is robust: The predicted and measured abundances are consistent with 95% credibility only if the baryon-to-photon ratio is between 2{times}10{sup {minus}10} and 6.5{times}10{sup {minus}10} and the number of light neutrino species is less than 3.9. Our analysis suggests that the {sup 4}He abundance may have been systematically underestimated. {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.},
doi = {10.1103/PhysRevLett.75.3981},
journal = {Physical Review Letters},
number = 22,
volume = 75,
place = {United States},
year = {1995},
month = {11}
}