Low energy hadronic contribution to the QED vacuum polarization
- 7 September 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 72 (5) , 057501
- https://doi.org/10.1103/physrevd.72.057501
Abstract
Recent improvements in the low energy annihilation data and their influence on the determination of the hadronic contribution to the running of the QED fine structure constant at are discussed. Using CMD-2 and KLOE measurements in the region we obtain at .
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