Constraint on a Varying Proton-Electron Mass Ratio 1.5 Billion Years after the Big Bang

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Authors: J. Bagdonaite, W. Ubachs, M. T. Murphy, J. B. Whitmore

Journal title: Physical Review Letters

Journal number: 114/7

Journal publisher: American Physical Society

Published year: 2015

DOI identifier: 10.1103/PhysRevLett.114.071301

ISSN: 0031-9007