Article

# Effect of alpha variation on the vibrational spectrum of Sr_2

11/2011; DOI:10.1103/PhysRevA.84.062114
Source: arXiv

ABSTRACT 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
$\mu\equiv m_e/m_p$ using optically trapped Sr$_2$ molecules [Zelevinsky et
al., Phys. Rev. Lett. {\bf 100}, 043201; Kotochigova et al., Phys. Rev. A {\bf
79}, 012504]. 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.

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### Keywords

$\alpha$ variation

4 times

experimental results

explicit consideration

fractional variation

Phys

planned experiment

prospective experiment

Sr$_2$ molecules [Zelevinsky

vibrational spectrum