On a variation of the proton-electron mass ratio

W.M.G. Ubachs, R. Buning, E.J. Salumbides, S. Hannemann, H.L. Bethlem, D. Bailly, M. Vervloet, L. Kaper, M.T. Murphy

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Recently indication for a possible variation of the proton-to-electron mass ratio μ=mp/me was found from a comparison between laboratory H2 spectroscopic data and the same lines in quasar spectra. This result will be put in perspective of other spectroscopic activities aiming at detection of variation of fundamental constants, on a cosmological as well as on a laboratory time scale. Furthermore the opportunities for obtaining improved laboratory wavelength positions of the relevant H2 absorption lines, as well as the prospects for obtaining a larger data set of H2 absorptions at high redshift will be presented. Also an experiment to detect Δμ on a laboratory time scale will be discussed.
Original languageEnglish
Title of host publicationProceedings of the XVIII International Conference on Laser Spectroscopy
EditorsL. Hollberg, J. Bergquist, M. Kasevich
PublisherWorld Scientific Publishing Co. Pte. Ltd.
ISBN (Print)9812813195, 9789812813190
Publication statusPublished - 2007
Event18th International Conference on Laser Spectroscopy, ICOLS 2007 - Telluride, CO, United States
Duration: 24 Jun 200729 Jun 2007


Conference18th International Conference on Laser Spectroscopy, ICOLS 2007
Country/TerritoryUnited States
CityTelluride, CO


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