Measurement of the Reaction ${\gamma }^{\ast }p\to \varphi p$ in Deep Inelastic $e^{+}p$ Scattering at HERA

ZEUS Collaboration

The production of $\varphi$ mesons in the reaction $e^{+}p\to e^{+}\varphi p$ ($\varphi \to K^{+}{K}^{-}$), for $7<Q^2<25$ GeV${}^2$ and for virtual photon-proton centre of mass ener…