Title :
New determination of the fine structure constant and test of the quantum electrodynamics
Author :
Cladé, Pierre ; Bouchendira, Rym ; Guellati, Saïda ; Nez, François ; Biraben, François
Author_Institution :
Lab. Kastler Brossel, Univ. Pierre et Marie Curie, Paris, France
fDate :
Aug. 28 2011-Sept. 1 2011
Abstract :
We present a new measurement of the ratio h/mRb between the Planck constant and the mass of 87Rb atom. A new value of the fine structure constant is deduced, α-1 = 137.035 999037 (91) with a relative uncertainty of 6.6 × 10-10. Using this determination, we obtain a theoretical value of the electron anomaly ae = 0.001 159 652 181 13(84) which is in agreement with the experimental measurement of Gabrielse (ae = 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.
Keywords :
atomic mass; fine structure; hadronic atoms; muonic atoms; quantum electrodynamics; rubidium; Planck constant; QED; Rb; fine structure constant; hadronic atom; muonic atom; quantum electrodynamics; Atomic measurements; Educational institutions; Equations; Magnetic moments; Measurement uncertainty; Uncertainty; Velocity measurement;
Conference_Titel :
Quantum Electronics Conference & Lasers and Electro-Optics (CLEO/IQEC/PACIFIC RIM), 2011
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4577-1939-4
DOI :
10.1109/IQEC-CLEO.2011.6193626