On 1/3/13 1:20 PM, Phillip Helbig---undress to reply wrote:

What I meant was that the predictions of big-bang nucleosynthesis depend
on this ratio, thus knowing the ratio ties down the predictions so that
there is no leeway.

Does big-bang nucleosynthetic baryonic production
based on the photon-to-baryon ratio
assume Fermi-Dirac statistics
and not any Bose-Einstein statistical contribution?

RDS