Phys. Rev. A 77, 012511 (2008) [11 pages]Prospects of detecting me∕mp variance using vibrational transition frequencies of 2Σ-state moleculesReceived 15 October 2007; revised 10 November 2007; published 24 January 2008 This paper discusses the possibility of measuring the variance in the electron-to-proton mass ratio β using the ∣X 2Σ, nv=0, N=0, J=1∕2, F=1, MF=1⟩→∣X 2Σ, nv=1 or 2, N=0, J=1∕2, F=1,MF=1⟩ transition frequencies of magnetically trapped cold 24MgH or 40CaH molecules. The uncertainty in this transition frequency can potentially be lower than 10−15, which makes it possible to measure the variance in β. The 24MgH transition is more advantageous for measurement than the 40CaH transition, because of the lower collision-loss rate, light shift, and collision shift. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.77.012511
DOI:
10.1103/PhysRevA.77.012511
PACS:
33.20.−t, 06.30.Ft, 34.10.+x
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