Title :
Improved value of the fine structure constant obtained from the electron g-2
Author_Institution :
Newman Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA
Abstract :
This paper reports improvement of the value of the fine structure constant /spl alpha/ by an extensive evaluation of the /spl alpha//sup 4/ term of the electron anomalous magnetic moment a/sub e/. This will enable us to obtain a value of /spl alpha/ with a precision exceeding 1 part in 10/sup 9/ when new measurements of a/sub e/ become available.
Keywords :
Feynman diagrams; constants; electrons; fine structure; g-factor; integration; iterative methods; lepton magnetic moment; quantum electrodynamics; Feynman diagrams; QED; VEGAS routine; dimensionless combination; electron anomalous magnetic moment; fine structure constant; fundamental physical constants; g factors; high precision values; improved numerical integration; iterative-adaptive Monte Carlo integration; uncertainty; vacuum polarisation; Electrons; Hall effect; Josephson effect; Laboratories; Magnetic moments; Measurement standards; Measurement uncertainty; Mesons; Neutrons; Physics;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851108
