Search for the U-boson in the process $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}\gamma ,U\to {\mu }^{+}{\mu }^{-}$ with the KLOE detector

F. Curciarello

We present a search for a new light vector boson, carrier of a "dark force" between WIMPs, with the KLOE detector at \DA$\Phi$NE. We analyzed $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}\gamma$ ISR events corres…