Exclusive photoproduction of $\varphi$ meson in $\gamma p\to \varphi p$ and $pp\to p\varphi p$ reactions

Anna Cisek, Wolfgang Schäfer, Antoni Szczurek

The amplitude for $\gamma p\to \varphi p$ is calculated in a pQCD $k_T$ - factorization approach. The total cross section for this process is compared with HERA data. Total cross section, as…