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Article Contents

ABSTRACT

1.INTRODUCTION

1.1.Baryon Asymmetry - Nucleon Abundance

1.2.The Expansion Rate At BBN

1.3.Neutrino Asymmetry

2.AN OVERVIEW OF PRIMORDIAL NUCLEOSYNTHESIS

2.1.Nonstandard BBN

2.2.Simple - But Accurate - Fits To The Primordial Abundances

2.3.SBBN-Predicted Primordial Abundances

3.OBSERVATIONALLY INFERRED PRIMORDIAL ABUNDANCES

3.1.The Primordial Deuterium Abundance

3.2.The Primordial Helium-3 Abundance

3.3.The Primordial Helium-4 Abundance

3.4.The Primordial Lithium-7 Abundance

4.DISCUSSION

4.1.SBBN

4.2.Lithium

4.3.Non-Standard Expansion Rate: S 1 (_e = 0)

4.4.Non-Zero Lepton Number: _e 0 (S = 1)

4.5.An Example: Alternate Relic Abundances for D and ⁴He

4.6.Other Non-Standard Models

5.SUMMARY AND CONCLUSIONS

REFERENCES