A comparative measurement of $\varphi \to K^{+}{K}^{-}$ and $\varphi \to {\mu }^{+}{\mu }^{-}$ in In-In collisions at the CERN SPS

NA60 Collaboration, R. Arnaldi, K. Banicz +49

The NA60 experiment at the CERN SPS has studied $\varphi$ meson production in In-In collisions at 158A GeV via both the $K^{+}{K}^{-}$ and the ${\mu }^{+}{\mu }^{-}$ decay channels. The yields and inverse s…