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• W2151094769 abstract "We extend our recent work on the effects of a time-varying fine-structure constant $ensuremath{alpha}$ in the cosmic microwave background by providing a thorough analysis of the degeneracies between $ensuremath{alpha}$ and the other cosmological parameters, and discussing ways to break these with both existing and/or forthcoming data. In particular, we present the state-of-the-art cosmic microwave background constraints on $ensuremath{alpha}$ through a combined analysis of the BOOMERanG, MAXIMA and DASI data sets. We also present a novel discussion of the constraints on $ensuremath{alpha}$ coming from large-scale structure observations, focusing in particular on the power spectrum from the 2dF survey. Our results are consistent with no variation in $ensuremath{alpha}$ from the epoch of recombination to the present day, and restrict any such variation to be less than about $4%.$ We show that the forthcoming Microwave Anisotropy Probe and Planck experiments will be able to break most of the currently existing degeneracies between $ensuremath{alpha}$ and other parameters, and measure $ensuremath{alpha}$ to better than percent accuracy." @default.
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• W2151094769 date "2002-06-28" @default.
• W2151094769 modified "2023-09-28" @default.
• W2151094769 title "Measuring<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>α</mml:mi></mml:math>in the early universe: CMB temperature, large-scale structure, and Fisher matrix analysis" @default.
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• W2151094769 doi "https://doi.org/10.1103/physrevd.66.023505" @default.
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