A stringent limit on a drifting proton-to-electron mass ratio from alcohol in the early Universe

J. Bagdonaite, P. Jansen, C. Henkel, H.L. Bethlem, K. Menten, W.M.G. Ubachs

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The standard model of physics is built on the fundamental constants of nature, but it does not provide an explanation for their values, nor require their constancy over space and time. Here we set a limit on a possible cosmological variation of the proton-to-electron mass ratio μ by comparing transitions in methanol observed in the early universe with those measured in the laboratory. From radio-astronomical observations of PKS1830-211, we deduced a constraint of Δμ/μ = (0.0 ± 1.0) × 10
Original languageEnglish
Pages (from-to)46-48
Number of pages3
JournalScience
Volume339
Issue number6115
Early online date13 Dec 2012
DOIs
Publication statusPublished - 2013

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