Bekenstein model and the time variation of the strong coupling constant

Details Bekenstein model and the time variation of the strong coupling constant Bekenstein model and the time variation of the strong coupling constant

2000-08-28

arxiv.org/abs/astro-ph/0008436v3

Phys.Lett.B504:1-5,2001

Astronomy and Astrophysics

Astrophysics

8 pages.typos corrected

Scientific paper

10.1016/S0370-2693(01)00293-3

We propose to generalize Bekenstein model for the time variation of the fine structure "constant" $\alpha_{em}$ to QCD strong coupling constant $\alpha_S$. We find that, except for a ``fine tuned'' choice of the free parameters, the extension can not be performed trivially without being in conflict with experimental constraints and this rules out $\alpha_S$ variability. This is due largely to the huge numerical value of the QCD vacuum gluon condensate when compared to the matter density of the universe.

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