Possible evidence for a variable fine structure constant from QSO absorption lines: Motivations, analysis and results

@article{Murphy2001PossibleEF,
  title={Possible evidence for a variable fine structure constant from QSO absorption lines: Motivations, analysis and results},
  author={Michael Murphy and John K Webb and Victor V. Flambaum and V. A. Dzuba and Christopher W. Churchill and J. Xavier Prochaska and John D. Barrow and Arthur M. Wolfe},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2001},
  volume={327},
  pages={1208-1222}
}
An experimental search for variation in the fundamental coupling constants is strongly motivated by modern high-energy physics theories. Comparison of quasar absorption line spectra with laboratory spectra provides a sensitive probe for variability of the ne structure constant, , over cosmological time-scales. We have previously developed and applied a new method providing an order of magnitude gain in precision over previous optical astrophysical constraints. Here we extend that work by… Expand

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Quasar (QSO) absorption spectra provide an extremely useful probe of possible cosmological variation in various physical constants. Comparison of H i 21-cm absorption with corresponding molecularExpand
Further constraints on variation of the fine‐structure constant from alkali‐doublet QSO absorption lines
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