Effect of alpha variation on the vibrational spectrum of Sr-2

Beloy, K., Hauser, A. W., Borschevsky, A., Flambaum, V. V. & Schwerdtfeger, P., 21-Dec-2011, In : Physical Review A. 84, 6, 4 p., 062114.

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We consider the effect of alpha variation on the vibrational spectrum of Sr-2 in the context of a planned experiment to test the stability of mu m(e)/m(p) using optically trapped Sr-2 molecules [Zelevinsky et al., Phys. Rev. Lett. 100, 043201 (2008); Kotochigova et al., Phys. Rev. A 79, 012504 (2009)]. We find the prospective experiment to be 3 to 4 times less sensitive to fractional variation in alpha as it is to fractional variation in mu. Depending on the precision ultimately achieved by the experiment, this result may give justification for the neglect of alpha variation or, alternatively, may call for its explicit consideration in the interpretation of experimental results.

Original languageEnglish
Article number062114
Number of pages4
JournalPhysical Review A
Issue number6
Publication statusPublished - 21-Dec-2011
Externally publishedYes

ID: 31141291