Big bang nucleosynthesis as a probe of fundamental "constants"

Details Big bang nucleosynthesis as a probe of fundamental "constants" Big bang nucleosynthesis as a probe of fundamental "constants"

2007-10-25

arxiv.org/abs/0710.4854v1

J.Phys.G35:014005,2008

Astronomy and Astrophysics

Astrophysics

Refereed article to be published in Nuclear Physics in Astrophysics III Proceedings, J. Phys. G. Special Issue. Based on work

Scientific paper

10.1088/0954-3899/35/1/014005

Big Bang nucleosynthesis (BBN) is the earliest sensitive probe of the values of many fundamental particle physics parameters. We have found the leading linear dependences of primordial abundances on all relevant parameters of the standard BBN code, including binding energies and nuclear reaction rates. This enables us to set limits on possible variations of fundamental parameters. We find that 7Li is expected to be significantly more sensitive than other species to many fundamental parameters, a result which also holds for variations of coupling strengths in grand unified (GUT) models. Our work also indicates which areas of nuclear theory need further development if the values of ``constants'' are to be more accurately probed.

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