Cargando…
Low energy hadronic contribution to the QED vacuum polarization
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 +/-...
| Autores principales: | , |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2005
|
| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.72.057501 http://cds.cern.ch/record/847957 |