Time Variation of the Fine Structure Constant Driven by Quintessence

Details Time Variation of the Fine Structure Constant Driven by Quintessence Time Variation of the Fine Structure Constant Driven by Quintessence

2003-06-11

arxiv.org/abs/hep-ph/0306084v3

Phys.Rev. D68 (2003) 083513

Physics

High Energy Physics

High Energy Physics - Phenomenology

Final version, to be published in Phys Rev D

Scientific paper

10.1103/PhysRevD.68.083513

There are indications from the study of quasar absorption spectra that the fine structure constant $\alpha$ may have been measurably smaller for redshifts $z>2.$ Analyses of other data ($^{149}$Sm fission rate for the Oklo natural reactor, variation of $^{187}$Re $\beta$-decay rate in meteorite studies, atomic clock measurements) which probe variations of $\alpha$ in the more recent past imply much smaller deviations from its present value. In this work we tie the variation of $\alpha$ to the evolution of the quintessence field proposed by Albrecht and Skordis, and show that agreement with all these data, as well as consistency with WMAP observations, can be achieved for a range of parameters. Some definite predictions follow for upcoming space missions searching for violations of the equivalence principle.

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