Figure 6

Figure 6: (Left): variation of the light element abundances in function of η compared to the spectroscopic abundances. The vertical line depicts the constraint obtained on η from the study of the cosmic microwave background data. The lithium-7 problem lies in the fact that ηspectro < ηWMAP. From [107]. (right): Dependence of the light element abundance on the independent variation of the BBN parameters, assuming η = ηWMAP. From [105]