M.G.Ryskin (PNPI)

Central exclusive production (CEP) as a probe of the gluonic component of the \eta' and \eta mesons

We consider the $pp \to p +\eta(')\eta(') + p$ exclusive diffractive production and calculate the relevant parton-level amplitudes for the $gg \to q\bar{q}gg$ and $gg \to gggg$ subprocesses. The cross sections for the CEP of \eta, \eta' meson pairs are strongly sensitive to the size of the gluon content of these mesons.