Low energy hadronic contribution to the QED vacuum polarization

Preprint

30 June 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0506323

Abstract

Recent improvements in the low energy e+e- annihilation data and their influence on the determination of the hadronic contribution to the running of the QED fine structure constant at m_Z are discussed. Using CMD-2 and KLOE measurements in the rho region we obtain Delta alpha(5)_had(s) = 0.02758 +/- 0.00035 at s = m_Z^2.

Keywords

HADRONIC CONTRIBUTION
POLARIZATION RECENT
ENERGY HADRONIC
QED VACUUM
VACUUM
DELTA
M_Z

All Related Versions

Version 1, 2005-06-30, ArXiv
Published version: Physical Review D, 72 (5), 057501.

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