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Article Contents

ABSTRACT

1.INTRODUCTION

1.1.Other Reviews

2.PHYSICS OF BBN

2.1.Historical Development

3.KEY PHYSICAL PROCESSES

3.1.Baryogenesis

3.2.The main physical processes in BBN

4.MEASUREMENT OF PRIMORDIAL ABUNDANCES

4.1.From Observed to Primordial Abundances

4.2.Key observational Requirements

5.DEUTERIUM IN QUASAR SPECTRA

5.1.ISM D/H

5.2.Solar System D/H

5.3.Galactic Chemical Evolution of D

5.4.Questions About D/H

5.4.1.Why is saturation of absorption lines important?

5.4.2.Hidden Velocity Structure

5.5.Correlated Velocity Structure: Mesoturbulence

5.5.1.Was the primordial D high but depleted in the absorbers?

5.5.2.Could the D/H which we observe be too high?

5.5.3.Is there spatial variation in D/H towards quasars?

5.5.4.Why is there lingering uncertainty over D?

5.5.5.Why we believe that the D/H is Primordial

5.5.6.Conclusions from D/H from quasars

6.HELIUM

7.³HE

8.LITHIUM

8.1.Primordial ⁷Li

8.2.⁶Li

9.BERYLLIUM

10.ARE THE DIFFERENT NUCLEI CONCORDANT OR IS THERE A CRISIS?

11.NON-STANDARD BBN

11.1.Inhomogeneous BBN

11.2.The number of Relativistic Particles and their Decays

12.COSMOLOGICAL BARYON DENSITY

12.1.Clusters of Galaxies

12.2.Local Dark Baryonic Matter

12.3.Simulations of the formation of Galaxies

12.4.CMB

12.5.The Achievements of BBN

13.THE ACHIEVEMENTS OF BBN

REFERENCES