New determination of the fine structure constant and test of the quantum electrodynamics

Details New determination of the fine structure constant and test of the quantum electrodynamics New determination of the fine structure constant and test of the quantum electrodynamics

2010-12-16

arxiv.org/abs/1012.3627v1

Phys.Rev.Lett.106:080801,2011

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevLett.106.080801

We report a new measurement of the ratio $h/m_{\mathrm{Rb}}$ between the Planck constant and the mass of $^{87}\mathrm{Rb}$ atom. A new value of the fine structure constant is deduced, $\alpha^{-1}=137.035\,999\,037\,(91)$ with a relative uncertainty of $6.6\times 10^{-10}$. Using this determination, we obtain a theoretical value of the electron anomaly $a_\mathrm{e}=0.001~159~652~181~13(84)$ which is in agreement with the experimental measurement of Gabrielse ($a_\mathrm{e}=0.001~159~652~180~73(28)$). The comparison of these values provides the most stringent test of the QED. Moreover, the precision is large enough to verify for the first time the muonic and hadronic contributions to this anomaly.

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