To appear in the Encyclopedia of Astronomy and Astrophysics (Institute of Physics) December, 2000


LIGHT ELEMENT NUCLEOSYNTHESIS

Gary Steigman


Departments of Physics and Astronomy, The Ohio State University, Columbus, OH 43210, USA


Table of Contents

INTRODUCTION

NUCLEOSYNTHESIS IN THE EARLY UNIVERSE
Weak Equilibrium and the 4He Abundance
Deuterium - The Ideal Baryometer
Helium-3 - Complicated Evolution
Lithium-7 - The Lithium Valley

FROM HERE AND NOW TO THERE AND THEN
Deuterium
Helium-4
Lithium-7

CONFRONTATION OF THEORY WITH DATA
Comparison of BBN with Non-BBN Baryon Density Estimates

COSMOLOGY CONSTRAINS PARTICLE PHYSICS

SUMMARY

REFERENCES

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