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arXiv · 1310.2767

Enhanced effects of temporal variation of the fundamental constants in ^{2}Π_{1/2} term diatomic molecules: ^{207}Pb^{19}F

V. V. Flambaum·Y. V. Stadnik·M. G. Kozlov·A. N. Petrov
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Abstract

The ^{207}Pb^{19}F molecule possesses a pair of closely spaced levels of opposite parity due to near cancelation of the omega-type doubling and magnetic hyperfine interaction energy shifts [Alphei et al., Phys. Rev. A, 83, 040501 (2011)]. We calculate the dependence of the transition frequency between these levels on the fine-structure constant (α) and the ratio of the light quark masses to the quantum chromodynamics scale (m_q/Λ_{QCD}), and find large enhancement of the relative effects of the variation of these parameters. Note that the effect of α-variation appears mainly due to the significant difference in the relativistic correction factors for the fine and hyperfine structure. We hence suggest the ^{207}Pb^{19}F molecule as a candidate system for investigating the possible temporal variation of the fundamental constants.

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V. V. Flambaum, Y. V. Stadnik, M. G. Kozlov, A. N. Petrov. 2013-11-07. Enhanced effects of temporal variation of the fundamental constants in ^{2}Π_{1/2} term diatomic molecules: ^{207}Pb^{19}F. https://doi.org/10.1103/physreva.88.052124

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