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New Limits to the Drift of Fundamental Constants from Laboratory Measurements by Fischer, M.; Kolachevsky, N.; Zimmermann, M.; Holzwarth, R.; Udem, Th.; Haensch, T. W.; Abgrall, M.; Gruenert, J.; Maksimovic, I.; Bize, S.; Marion, H.; Santos, F. Pereira Dos; Lemonde, P.; Santarelli, G.; Laurent, P.; Clairon, A.; Salomon, C.; Haas, M.; Jentschura, U. D.; Keitel, C. H. is a scholarly article available to read on EtoBox.

What is New Limits to the Drift of Fundamental Constants from Laboratory Measurements about?

We have remeasured the absolute $1S$-$2S$ transition frequency $\nu_{\rm {H}}$ in atomic hydrogen. A comparison with the result of the previous measurement performed in 1999 sets a limit of $(-29\pm 57)$ Hz for the drift of $\nu_{\rm {H}}$ with respect to the ground state hyperfine splitting $\nu_{{\rm {Cs}}}$ in $^{133}$Cs. Combining this result with the recently published optical transition frequency in $^{199}$Hg$^+$ against $\nu_{\rm {Cs}}$ and a microwave $^{87}$Rb and $^{133}$Cs clock comparison, we deduce separate limits on $\dot{\alpha}/\alpha = (-0.9\pm 2.9)\times 10^{-15}$ yr$^{-1}$ and the fractional time variation of the ratio of Rb and Cs nuclear magnetic moments $\mu_{\rm {Rb}}/\mu_{\rm {Cs}}$ equal to $(-0.5 \pm 1.7)\times 10^{-15}$ yr$^{-1}$. The latter provides information on the temporal behavior of the constant of strong interaction.

Author

Fischer, M.; Kolachevsky, N.; Zimmermann, M.; Holzwarth, R.; Udem, Th.; Haensch, T. W.; Abgrall, M.; Gruenert, J.; Maksimovic, I.; Bize, S.; Marion, H.; Santos, F. Pereira Dos; Lemonde, P.; Santarelli, G.; Laurent, P.; Clairon, A.; Salomon, C.; Haas, M.; Jentschura, U. D.; Keitel, C. H.

Published

2003

Language

EN