Constraints on time variation of fine structure constant from WMAP-3 yr data


This paper presents the constraints on the time variation of the fine structure constant at recombination relative to its present value, ∆α = (αrec − α0)/α0, obtained from the analysis of the WMAP-3yr Cosmic Microwave Background (CMB) data, with an additional prior on the Hubble expansion rate from HST Hubble Key Project. I found out that −0.039 < ∆α < 0… (More)

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