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

V. De Leo

The precision measurement of the $d\sigma (e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}\gamma )/d\sqrt{s}$ cross section with the photon emitted in the initial state with the KLOE detector has been used to meas…