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

2010/12/16 by Rym Bouchendira, Pierre Cladé, Saïda Guellati-Khélifa +2 · 1 citation
Physics and Astronomy · #physics.atom-ph

paper · pdf · doi:10.1103/physrevlett.106.080801

published as Phys.Rev.Lett.106:080801,2011

arxiv created 2010/12/16 · arxiv updated 2011/03/02

Abstract

We report a new measurement of the ratio h/m_Rb between the Planck constant and the mass of ⁸⁷Rb atom. A new value of the fine structure constant is deduced, α^-1=137.035 999 037 (91) with a relative uncertainty of 6.6× 10^-10. Using this determination, we obtain a theoretical value of the electron anomaly a_e=0.001~159~652~181~13(84) which is in agreement with the experimental measurement of Gabrielse (a_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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