State of the art in the determination of the fine structure constant: test of Quantum Electrodynamics and determination of inline image

Authors

  • Rym Bouchendira,

    1. Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, Paris, Cedex 05, France
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  • Pierre Cladé,

    1. Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, Paris, Cedex 05, France
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  • Saida Guellati-Khélifa,

    Corresponding author
    1. Conservatoire National des Arts et Métiers, Paris, Cedex 03, France
    • Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, Paris, Cedex 05, France
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  • Francois Nez,

    1. Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, Paris, Cedex 05, France
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  • Francois Biraben

    1. Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, Paris, Cedex 05, France
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Corresponding author E-mail: guellati@spectro.jussieu.fr

Abstract

The fine structure constant α has a particular status in physics. Its precise determination is required to test the quantum electrodynamics (QED) theory. The constant α is also a keystone for the determination of other fundamental physical constants, especially the ones involved in the framework of the future International System of units. This paper presents Paris experiment, where the fine structure constant is determined by measuring the recoil velocity of a rubidium atom when it absorbs a photon. The impact of the recent improvement of QED calculations of the electron moment anomaly and the recent measurement of the cesium atom recoil at Berkeley will be discussed. The opportunity to provide a precise value of the ratio inline image between the Planck constant and the atomic mass constant will be investigated.

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