Measurement of the running of the fine structure constant below 1 GeV with the KLOE Detector

2 Collaboration, A. Anastasi, D. Babusci +63

We have measured the running of the effective QED coupling constant $\alpha (s)$ in the time-like region $0.6<\sqrt{s}<0.975$ GeV with the KLOE detector at DA$\Phi$NE using the Initial Stat…