Effect of α variation on the vibrational spectrum of Sr 2

K. Beloy*, Andreas Hauser, A. Borschevsky, V. V. Flambaum, P. Schwerdtfeger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We consider the effect of α variation on the vibrational spectrum of Sr 2 in the context of a planned experiment to test the stability of μ m e/m p using optically trapped Sr 2 molecules. We find the prospective experiment to be 3 to 4 times less sensitive to fractional variation in α as it is to fractional variation in μ. Depending on the precision ultimately achieved by the experiment, this result may give justification for the neglect of α variation or, alternatively, may call for its explicit consideration in the interpretation of experimental results.

Original languageEnglish
Article number062114
JournalPhysical Review A
Issue number6
Publication statusPublished - 21 Dec 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fields of Expertise

  • Advanced Materials Science

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